diff --git a/Makefile b/Makefile
index 0bf29ab5..7a29a5d1 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ INTRO =  HEADER.md
 PUB = nuklear.h
 OUTPUT = nuklear.h
 
-PRIV1 = nuklear_internal.h nuklear_math.c nuklear_util.c nuklear_color.c nuklear_utf8.c nuklear_buffer.c nuklear_string.c nuklear_draw.c nuklear_vertex.c 
+PRIV1 = nuklear_internal.h nuklear_math.c nuklear_util.c nuklear_crc.c nuklear_color.c nuklear_utf8.c nuklear_buffer.c nuklear_string.c nuklear_draw.c nuklear_vertex.c 
 
 EXTERN =  stb_rect_pack.h stb_truetype.h 
 
diff --git a/demo/sdl_opengl2/main.c b/demo/sdl_opengl2/main.c
index ebd84eb5..9bdc7f0a 100644
--- a/demo/sdl_opengl2/main.c
+++ b/demo/sdl_opengl2/main.c
@@ -20,6 +20,7 @@
 #define NK_INCLUDE_FONT_BAKING
 #define NK_INCLUDE_DEFAULT_FONT
 #define NK_IMPLEMENTATION
+#define NK_DRAW_CRC
 #define NK_SDL_GL2_IMPLEMENTATION
 #include "../../nuklear.h"
 #include "nuklear_sdl_gl2.h"
diff --git a/nuklear.h b/nuklear.h
index 71b55a24..eac7ce26 100644
--- a/nuklear.h
+++ b/nuklear.h
@@ -4858,6 +4858,9 @@ struct nk_command_buffer {
     int use_clipping;
     nk_handle userdata;
     nk_size begin, end, last;
+#ifdef NK_DRAW_CRC
+    nk_hash crc;
+#endif
 };
 
 /** shape outlines */
@@ -5963,6 +5966,9 @@ struct nk_context {
     struct nk_page_element *freelist;
     unsigned int count;
     unsigned int seq;
+#ifdef NK_DRAW_CRC
+    nk_hash crc;
+#endif
 };
 
 /* ==============================================================
@@ -7910,6 +7916,131 @@ nk_text_calculate_text_bounds(const struct nk_user_font *font,
 }
 
 
+/** 
+ * \file nuklear_crc.c 
+ * \brief Implements CRC checking of the draw command buffer.
+ * 
+ * \details Implements a rolling CRC that gets updated with every draw_push
+ * function call. That is, for every `nk_xxx` api function call between
+ * `nk_begin()` and `nk_end()` there is one to many draw commands pushed into
+ * the draw buffer.  For each one of those pushes, the command type and data is
+ * hashed, then stored into that buffer's CRC member. Then on the next `nk_xxx`
+ * function call, another command push is executed and the previous crc is
+ * updated with the new hash of the new command. This will result in a unique CRC
+ * value in the buffers crc member at the end of the draw execution. 
+ *
+ * The purpose of this is to allow super cheap and fast detection of unique'ness
+ * between draw loops, such that the user can determine if they need to redraw
+ * the screen or not. The original method was to have the user store a copy of
+ * the entire draw buffer, then loop through the buffer and compare that with
+ * the most recent draw buffer. Once done, you can determine if something
+ * changed on the screen and needs to be `nk_convert`'d. Doing it that way would
+ * require 1 loop to fill the command buffer, 1 loop to check the command buffer
+ * against the previously stored buffer, then 1 more loop to copy the new buffer
+ * into the old for the next draw loop iteration. That is 3 loops of
+ * `command_buffer'length()` which could end up being quite large; making this
+ * an expensive operation. Which almost defeats the purpose of detecting
+ * unique'ness in the first place.
+ * 
+ * Yet implementing this CRC, we crunch all of that down into just the initial
+ * draw loop. Then you have a unique code stored in a 32-bit integer that
+ * represents the buffer. So if you need to know if the current draw command
+ * buffer is different from the previous one; you simply need to retain a single
+ * interger value and then check whether the old interger is equal to the new
+ * one. We reduced 3x O(n) loop complexity and 2x O(n) memory/space complexity
+ * down to 1x O(n) loop complexity and O(1) memory complexity. The CRC
+ * calculation (depending on default or custom implementation) simply adds 1
+ * table lookup and 1 XOR operation to a single integer. Practically a free
+ * upgrade by comparison.
+ *
+ * If you want to use the CRC, then you must either `#define NK_DRAW_CRC`
+ * or `#define NK_DRAW_CRC_CUSTOM` 
+ *
+ * `#define NK_DRAW_CRC` will implement the default CRC algorithm which is the
+ * same murmur hash function used in the nuklear window titles.
+ *
+ * `#define NK_DRAW_CRC_CUSTOM` will allow the user to define their own CRC
+ * implementation. This is available because most embedded systems already have
+ * a CRC calculation of some kind, usually defined by their system constraints,
+ * so it would be redundant to create yet another CRC method. Or, perhaps the
+ * murmur hash is more expensive than what your application requires, so you can
+ * implement a super simple/cheap version of your own for your needs.
+ *
+ * To use the `NK_DRAW_CRC_CUSTOM` the user will need to `#define
+ * NK_CRC_SEED` to their desired seed and also `#define NK_CRC_FUNC(k,l,s)` to
+ * the user defined implementation of the crc.
+ *
+ * The user defined implementation of the CRC **SHALL** have the declaration of
+ * ```c
+ * nk_hash <xxCustomNamexx>(const void * key, int len, nk_hash seed)
+ * ```
+ *
+ * other than that, the user is free to use any CRC algorithm, table,
+ * implementation they choose.
+ *
+ * \internal
+ * Information for nuklear developers. Each context includes a command buffer
+ * for drawing, usually called `ctx->current->buffer`. This is the buffer with
+ * the draw commands and we grab the CRC value stored with this buffer
+ * `ctx->current->buffer.crc`. The buffer, in regards to a context, only exists
+ * to draw a panel and will _dissappear_ once `nk_end()` is called. This is
+ * because nk_end commits the draw buffer to the context's overal draw array and
+ * closes out the `current` buffer to wait for another `nk_begin()` to start a
+ * new panel using the `nk_buffer_start()` command. 
+ *
+ * What this means for the CRC is that, when a user decides they want to check
+ * on the CRC, they will do so **after** the `nk_end()` call (because you need
+ * to make sure all of the information is there). But attempting to grab the CRC
+ * at `ctx->current->buffer.crc` will result in a Seg Fault because that memory
+ * was deallocated with the `nk_end()` call. But not only that, we determined
+ * that the `current->buffer` is meant to be used for all sequences of
+ * `nk_begin()` to `nk_end()`. Meaning that we will get new CRCs for each panel;
+ * but only be able to look at the final CRC (unless we grab them as we go, but
+ * thats silly when we just want to know whether to draw or not). That means we
+ * better hope the user only ever interacts with which ever panel was the final
+ * one drawn, otherwise we wont see a crc change.
+ *
+ * The solution was to store the CRC at the Context level. So now `struct
+ * nk_context` contains a `crc` member that gets rolled when the current buffer
+ * finishes (i.e. `nk_end()` was called). This means that, whenever
+ * `nk_finish` is called, we calc the context CRC based off the current buffer
+ * crc. This retains the CRC value through successive calls to `nk_begin()` and
+ * `nk_end()` and rolls the number appropriately.
+ *
+ * also, the crc/hash calculation has to be done, not within
+ * `nk_command_buffer_push` but within each individual command type function 
+ * - `nk_push_scissor()
+ * - `nk_stroke_line()`
+ * - `nk_push_image()`
+ * - ...
+ *   because the `nk_command_buffer_push` actually doesn't _push_ anything. its
+ *   really just and allocator that return the pointer, then allows the calling
+ *   function to fill that memory space with the parameters. So we need the
+ *   individual calling functions to calculate the crc less we lose unique data
+ *   for the specific call (looking at you highlight on hover feature).
+ * \addtogroup crc 
+ * \brief Command buffer CRC Implementation
+ * @{
+ */
+
+#ifdef NK_DRAW_CRC_CUSTOM
+  #ifndef NK_CRC_SEED
+    #error "Must #define NK_CRC_SEED when using NK_DRAW_CRC_CUSTOM"
+  #endif
+  #ifndef NK_CRC_FUNC(k,l,s)
+    #error "Must #define NK_CRC_FUNC(key,length,seed) when using NK_DRAW_CRC_CUSTOM"
+  #endif
+  #define NK_DRAW_CRC
+#endif
+
+#ifdef NK_DRAW_CRC
+  #define NK_CRC_SEED 0xffffffff /**< seed value of the crc*/
+  #define NK_CRC_FUNC(k,l,s) nk_murmur_hash(k,(l), s) 
+  #warn "YO FUCK THIS CRC SHIT"
+
+/** @} *//*end documentation grouping*/
+#endif /* NK_DRAW_CRC
+
 
 
 
@@ -9291,6 +9422,9 @@ nk_push_scissor(struct nk_command_buffer *b, struct nk_rect r)
     cmd->y = (short)r.y;
     cmd->w = (unsigned short)NK_MAX(0, r.w);
     cmd->h = (unsigned short)NK_MAX(0, r.h);
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof nk_command_scissor*, b->crc);
+#endif
 }
 NK_API void
 nk_stroke_line(struct nk_command_buffer *b, float x0, float y0,
@@ -9308,6 +9442,9 @@ nk_stroke_line(struct nk_command_buffer *b, float x0, float y0,
     cmd->end.x = (short)x1;
     cmd->end.y = (short)y1;
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_line*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_curve(struct nk_command_buffer *b, float ax, float ay,
@@ -9331,6 +9468,9 @@ nk_stroke_curve(struct nk_command_buffer *b, float ax, float ay,
     cmd->end.x = (short)bx;
     cmd->end.y = (short)by;
     cmd->color = col;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_curve*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_rect(struct nk_command_buffer *b, struct nk_rect rect,
@@ -9354,6 +9494,9 @@ nk_stroke_rect(struct nk_command_buffer *b, struct nk_rect rect,
     cmd->w = (unsigned short)NK_MAX(0, rect.w);
     cmd->h = (unsigned short)NK_MAX(0, rect.h);
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_rect*), b->crc);
+#endif
 }
 NK_API void
 nk_fill_rect(struct nk_command_buffer *b, struct nk_rect rect,
@@ -9377,6 +9520,9 @@ nk_fill_rect(struct nk_command_buffer *b, struct nk_rect rect,
     cmd->w = (unsigned short)NK_MAX(0, rect.w);
     cmd->h = (unsigned short)NK_MAX(0, rect.h);
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_rect_filled*), b->crc);
+#endif
 }
 NK_API void
 nk_fill_rect_multi_color(struct nk_command_buffer *b, struct nk_rect rect,
@@ -9403,6 +9549,9 @@ nk_fill_rect_multi_color(struct nk_command_buffer *b, struct nk_rect rect,
     cmd->top = top;
     cmd->right = right;
     cmd->bottom = bottom;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_rect_multi_color*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_circle(struct nk_command_buffer *b, struct nk_rect r,
@@ -9425,6 +9574,9 @@ nk_stroke_circle(struct nk_command_buffer *b, struct nk_rect r,
     cmd->w = (unsigned short)NK_MAX(r.w, 0);
     cmd->h = (unsigned short)NK_MAX(r.h, 0);
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_circle*), b->crc);
+#endif
 }
 NK_API void
 nk_fill_circle(struct nk_command_buffer *b, struct nk_rect r, struct nk_color c)
@@ -9446,6 +9598,9 @@ nk_fill_circle(struct nk_command_buffer *b, struct nk_rect r, struct nk_color c)
     cmd->w = (unsigned short)NK_MAX(r.w, 0);
     cmd->h = (unsigned short)NK_MAX(r.h, 0);
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_circle_filled*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_arc(struct nk_command_buffer *b, float cx, float cy, float radius,
@@ -9463,6 +9618,9 @@ nk_stroke_arc(struct nk_command_buffer *b, float cx, float cy, float radius,
     cmd->a[0] = a_min;
     cmd->a[1] = a_max;
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_arc*), b->crc);
+#endif
 }
 NK_API void
 nk_fill_arc(struct nk_command_buffer *b, float cx, float cy, float radius,
@@ -9480,6 +9638,9 @@ nk_fill_arc(struct nk_command_buffer *b, float cx, float cy, float radius,
     cmd->a[0] = a_min;
     cmd->a[1] = a_max;
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_arc_filled*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_triangle(struct nk_command_buffer *b, float x0, float y0, float x1,
@@ -9507,6 +9668,9 @@ nk_stroke_triangle(struct nk_command_buffer *b, float x0, float y0, float x1,
     cmd->c.x = (short)x2;
     cmd->c.y = (short)y2;
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_triangle*), b->crc);
+#endif
 }
 NK_API void
 nk_fill_triangle(struct nk_command_buffer *b, float x0, float y0, float x1,
@@ -9534,6 +9698,9 @@ nk_fill_triangle(struct nk_command_buffer *b, float x0, float y0, float x1,
     cmd->c.x = (short)x2;
     cmd->c.y = (short)y2;
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_triangle_filled*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_polygon(struct nk_command_buffer *b, const float *points, int point_count,
@@ -9555,6 +9722,9 @@ nk_stroke_polygon(struct nk_command_buffer *b, const float *points, int point_co
         cmd->points[i].x = (short)points[i*2];
         cmd->points[i].y = (short)points[i*2+1];
     }
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_polygon*), b->crc);
+#endif
 }
 NK_API void
 nk_fill_polygon(struct nk_command_buffer *b, const float *points, int point_count,
@@ -9576,6 +9746,9 @@ nk_fill_polygon(struct nk_command_buffer *b, const float *points, int point_coun
         cmd->points[i].x = (short)points[i*2+0];
         cmd->points[i].y = (short)points[i*2+1];
     }
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_polygon_filled*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_polyline(struct nk_command_buffer *b, const float *points, int point_count,
@@ -9597,6 +9770,9 @@ nk_stroke_polyline(struct nk_command_buffer *b, const float *points, int point_c
         cmd->points[i].x = (short)points[i*2];
         cmd->points[i].y = (short)points[i*2+1];
     }
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_polyline*), b->crc);
+#endif
 }
 NK_API void
 nk_draw_image(struct nk_command_buffer *b, struct nk_rect r,
@@ -9620,6 +9796,9 @@ nk_draw_image(struct nk_command_buffer *b, struct nk_rect r,
     cmd->h = (unsigned short)NK_MAX(0, r.h);
     cmd->img = *img;
     cmd->col = col;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_image*), b->crc);
+#endif
 }
 NK_API void
 nk_draw_nine_slice(struct nk_command_buffer *b, struct nk_rect r,
@@ -9720,6 +9899,9 @@ nk_push_custom(struct nk_command_buffer *b, struct nk_rect r,
     cmd->h = (unsigned short)NK_MAX(0, r.h);
     cmd->callback_data = usr;
     cmd->callback = cb;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_custom*), b->crc); //here be dragons
+#endif
 }
 NK_API void
 nk_draw_text(struct nk_command_buffer *b, struct nk_rect r,
@@ -9761,6 +9943,10 @@ nk_draw_text(struct nk_command_buffer *b, struct nk_rect r,
     cmd->height = font->height;
     NK_MEMCPY(cmd->string, string, (nk_size)length);
     cmd->string[length] = '\0';
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_text *), b->crc); // command
+    b->crc = NK_CRC_FUNC((const void*)cmd->string,length, b->crc); //text
+#endif
 }
 
 
@@ -19512,6 +19698,9 @@ nk_start_buffer(struct nk_context *ctx, struct nk_command_buffer *buffer)
     buffer->end = buffer->begin;
     buffer->last = buffer->begin;
     buffer->clip = nk_null_rect;
+#ifdef NK_DRAW_CRC
+    buffer->crc = NK_CRC_SEED;
+#endif
 }
 NK_LIB void
 nk_start(struct nk_context *ctx, struct nk_window *win)
@@ -19555,6 +19744,9 @@ nk_finish_buffer(struct nk_context *ctx, struct nk_command_buffer *buffer)
     NK_ASSERT(buffer);
     if (!ctx || !buffer) return;
     buffer->end = ctx->memory.allocated;
+#ifdef NK_DRAW_CRC
+    ctx->crc = buffer.crc;
+#endif
 }
 NK_LIB void
 nk_finish(struct nk_context *ctx, struct nk_window *win)
@@ -19566,8 +19758,16 @@ nk_finish(struct nk_context *ctx, struct nk_window *win)
     NK_ASSERT(ctx);
     NK_ASSERT(win);
     if (!ctx || !win) return;
+    
+
     nk_finish_buffer(ctx, &win->buffer);
+
     if (!win->popup.buf.active) return;
+#ifdef NK_DRAW_CRC
+    /*combine the normal buffer with the popup buffer*/
+    /*i don't know why, but for all other buffers, we use "finish"*/
+    ctx->crc = NK_CRC_FUNC(ctx->crc, &win->popup.buf.crc, sizeof(win->popup.buf.crc));
+#endif
 
     buf = &win->popup.buf;
     memory = ctx->memory.memory.ptr;
@@ -30716,6 +30916,7 @@ nk_tooltipfv(struct nk_context *ctx, const char *fmt, va_list args)
 ///   - [y]: Minor version with non-breaking API and library changes
 ///   - [z]: Patch version with no direct changes to the API
 ///
+/// - 2025/06/05 (4.12.8) - Adds CRC check on draw command buffer 
 /// - 2025/04/06 (4.12.7) - Fix text input navigation and mouse scrolling
 /// - 2025/03/29 (4.12.6) - Fix unitialized data in nk_input_char
 /// - 2025/03/05 (4.12.5) - Fix scrolling knob also scrolling parent window, remove dead code
diff --git a/src/CHANGELOG b/src/CHANGELOG
index 300c3d40..797a1ac8 100644
--- a/src/CHANGELOG
+++ b/src/CHANGELOG
@@ -7,6 +7,7 @@
 ///   - [y]: Minor version with non-breaking API and library changes
 ///   - [z]: Patch version with no direct changes to the API
 ///
+/// - 2025/06/05 (4.12.8) - Adds CRC check on draw command buffer 
 /// - 2025/04/06 (4.12.7) - Fix text input navigation and mouse scrolling
 /// - 2025/03/29 (4.12.6) - Fix unitialized data in nk_input_char
 /// - 2025/03/05 (4.12.5) - Fix scrolling knob also scrolling parent window, remove dead code
diff --git a/src/nuklear.h b/src/nuklear.h
index 9b526566..bc981954 100644
--- a/src/nuklear.h
+++ b/src/nuklear.h
@@ -4635,6 +4635,9 @@ struct nk_command_buffer {
     int use_clipping;
     nk_handle userdata;
     nk_size begin, end, last;
+#ifdef NK_DRAW_CRC
+    nk_hash crc;
+#endif
 };
 
 /** shape outlines */
@@ -5740,6 +5743,9 @@ struct nk_context {
     struct nk_page_element *freelist;
     unsigned int count;
     unsigned int seq;
+#ifdef NK_DRAW_CRC
+    nk_hash crc;
+#endif
 };
 
 /* ==============================================================
diff --git a/src/nuklear_context.c b/src/nuklear_context.c
index 77144968..fce86a69 100644
--- a/src/nuklear_context.c
+++ b/src/nuklear_context.c
@@ -182,6 +182,9 @@ nk_start_buffer(struct nk_context *ctx, struct nk_command_buffer *buffer)
     buffer->end = buffer->begin;
     buffer->last = buffer->begin;
     buffer->clip = nk_null_rect;
+#ifdef NK_DRAW_CRC
+    buffer->crc = NK_CRC_SEED;
+#endif
 }
 NK_LIB void
 nk_start(struct nk_context *ctx, struct nk_window *win)
@@ -225,6 +228,9 @@ nk_finish_buffer(struct nk_context *ctx, struct nk_command_buffer *buffer)
     NK_ASSERT(buffer);
     if (!ctx || !buffer) return;
     buffer->end = ctx->memory.allocated;
+#ifdef NK_DRAW_CRC
+    ctx->crc = buffer.crc;
+#endif
 }
 NK_LIB void
 nk_finish(struct nk_context *ctx, struct nk_window *win)
@@ -236,8 +242,16 @@ nk_finish(struct nk_context *ctx, struct nk_window *win)
     NK_ASSERT(ctx);
     NK_ASSERT(win);
     if (!ctx || !win) return;
+    
+
     nk_finish_buffer(ctx, &win->buffer);
+
     if (!win->popup.buf.active) return;
+#ifdef NK_DRAW_CRC
+    /*combine the normal buffer with the popup buffer*/
+    /*i don't know why, but for all other buffers, we use "finish"*/
+    ctx->crc = NK_CRC_FUNC(ctx->crc, &win->popup.buf.crc, sizeof(win->popup.buf.crc));
+#endif
 
     buf = &win->popup.buf;
     memory = ctx->memory.memory.ptr;
diff --git a/src/nuklear_crc.c b/src/nuklear_crc.c
new file mode 100644
index 00000000..7873289f
--- /dev/null
+++ b/src/nuklear_crc.c
@@ -0,0 +1,124 @@
+/** 
+ * \file nuklear_crc.c 
+ * \brief Implements CRC checking of the draw command buffer.
+ * 
+ * \details Implements a rolling CRC that gets updated with every draw_push
+ * function call. That is, for every `nk_xxx` api function call between
+ * `nk_begin()` and `nk_end()` there is one to many draw commands pushed into
+ * the draw buffer.  For each one of those pushes, the command type and data is
+ * hashed, then stored into that buffer's CRC member. Then on the next `nk_xxx`
+ * function call, another command push is executed and the previous crc is
+ * updated with the new hash of the new command. This will result in a unique CRC
+ * value in the buffers crc member at the end of the draw execution. 
+ *
+ * The purpose of this is to allow super cheap and fast detection of unique'ness
+ * between draw loops, such that the user can determine if they need to redraw
+ * the screen or not. The original method was to have the user store a copy of
+ * the entire draw buffer, then loop through the buffer and compare that with
+ * the most recent draw buffer. Once done, you can determine if something
+ * changed on the screen and needs to be `nk_convert`'d. Doing it that way would
+ * require 1 loop to fill the command buffer, 1 loop to check the command buffer
+ * against the previously stored buffer, then 1 more loop to copy the new buffer
+ * into the old for the next draw loop iteration. That is 3 loops of
+ * `command_buffer'length()` which could end up being quite large; making this
+ * an expensive operation. Which almost defeats the purpose of detecting
+ * unique'ness in the first place.
+ * 
+ * Yet implementing this CRC, we crunch all of that down into just the initial
+ * draw loop. Then you have a unique code stored in a 32-bit integer that
+ * represents the buffer. So if you need to know if the current draw command
+ * buffer is different from the previous one; you simply need to retain a single
+ * interger value and then check whether the old interger is equal to the new
+ * one. We reduced 3x O(n) loop complexity and 2x O(n) memory/space complexity
+ * down to 1x O(n) loop complexity and O(1) memory complexity. The CRC
+ * calculation (depending on default or custom implementation) simply adds 1
+ * table lookup and 1 XOR operation to a single integer. Practically a free
+ * upgrade by comparison.
+ *
+ * If you want to use the CRC, then you must either `#define NK_DRAW_CRC`
+ * or `#define NK_DRAW_CRC_CUSTOM` 
+ *
+ * `#define NK_DRAW_CRC` will implement the default CRC algorithm which is the
+ * same murmur hash function used in the nuklear window titles.
+ *
+ * `#define NK_DRAW_CRC_CUSTOM` will allow the user to define their own CRC
+ * implementation. This is available because most embedded systems already have
+ * a CRC calculation of some kind, usually defined by their system constraints,
+ * so it would be redundant to create yet another CRC method. Or, perhaps the
+ * murmur hash is more expensive than what your application requires, so you can
+ * implement a super simple/cheap version of your own for your needs.
+ *
+ * To use the `NK_DRAW_CRC_CUSTOM` the user will need to `#define
+ * NK_CRC_SEED` to their desired seed and also `#define NK_CRC_FUNC(k,l,s)` to
+ * the user defined implementation of the crc.
+ *
+ * The user defined implementation of the CRC **SHALL** have the declaration of
+ * ```c
+ * nk_hash <xxCustomNamexx>(const void * key, int len, nk_hash seed)
+ * ```
+ *
+ * other than that, the user is free to use any CRC algorithm, table,
+ * implementation they choose.
+ *
+ * \internal
+ * Information for nuklear developers. Each context includes a command buffer
+ * for drawing, usually called `ctx->current->buffer`. This is the buffer with
+ * the draw commands and we grab the CRC value stored with this buffer
+ * `ctx->current->buffer.crc`. The buffer, in regards to a context, only exists
+ * to draw a panel and will _dissappear_ once `nk_end()` is called. This is
+ * because nk_end commits the draw buffer to the context's overal draw array and
+ * closes out the `current` buffer to wait for another `nk_begin()` to start a
+ * new panel using the `nk_buffer_start()` command. 
+ *
+ * What this means for the CRC is that, when a user decides they want to check
+ * on the CRC, they will do so **after** the `nk_end()` call (because you need
+ * to make sure all of the information is there). But attempting to grab the CRC
+ * at `ctx->current->buffer.crc` will result in a Seg Fault because that memory
+ * was deallocated with the `nk_end()` call. But not only that, we determined
+ * that the `current->buffer` is meant to be used for all sequences of
+ * `nk_begin()` to `nk_end()`. Meaning that we will get new CRCs for each panel;
+ * but only be able to look at the final CRC (unless we grab them as we go, but
+ * thats silly when we just want to know whether to draw or not). That means we
+ * better hope the user only ever interacts with which ever panel was the final
+ * one drawn, otherwise we wont see a crc change.
+ *
+ * The solution was to store the CRC at the Context level. So now `struct
+ * nk_context` contains a `crc` member that gets rolled when the current buffer
+ * finishes (i.e. `nk_end()` was called). This means that, whenever
+ * `nk_finish` is called, we calc the context CRC based off the current buffer
+ * crc. This retains the CRC value through successive calls to `nk_begin()` and
+ * `nk_end()` and rolls the number appropriately.
+ *
+ * also, the crc/hash calculation has to be done, not within
+ * `nk_command_buffer_push` but within each individual command type function 
+ * - `nk_push_scissor()
+ * - `nk_stroke_line()`
+ * - `nk_push_image()`
+ * - ...
+ *   because the `nk_command_buffer_push` actually doesn't _push_ anything. its
+ *   really just and allocator that return the pointer, then allows the calling
+ *   function to fill that memory space with the parameters. So we need the
+ *   individual calling functions to calculate the crc less we lose unique data
+ *   for the specific call (looking at you highlight on hover feature).
+ * \addtogroup crc 
+ * \brief Command buffer CRC Implementation
+ * @{
+ */
+
+#ifdef NK_DRAW_CRC_CUSTOM
+  #ifndef NK_CRC_SEED
+    #error "Must #define NK_CRC_SEED when using NK_DRAW_CRC_CUSTOM"
+  #endif
+  #ifndef NK_CRC_FUNC(k,l,s)
+    #error "Must #define NK_CRC_FUNC(key,length,seed) when using NK_DRAW_CRC_CUSTOM"
+  #endif
+  #define NK_DRAW_CRC
+#endif
+
+#ifdef NK_DRAW_CRC
+  #define NK_CRC_SEED 0xffffffff /**< seed value of the crc*/
+  #define NK_CRC_FUNC(k,l,s) nk_murmur_hash(k,(l), s) 
+  #warn "YO FUCK THIS CRC SHIT"
+
+/** @} *//*end documentation grouping*/
+#endif /* NK_DRAW_CRC
diff --git a/src/nuklear_draw.c b/src/nuklear_draw.c
index 8505ed7b..887b8e18 100644
--- a/src/nuklear_draw.c
+++ b/src/nuklear_draw.c
@@ -84,6 +84,9 @@ nk_push_scissor(struct nk_command_buffer *b, struct nk_rect r)
     cmd->y = (short)r.y;
     cmd->w = (unsigned short)NK_MAX(0, r.w);
     cmd->h = (unsigned short)NK_MAX(0, r.h);
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof nk_command_scissor*, b->crc);
+#endif
 }
 NK_API void
 nk_stroke_line(struct nk_command_buffer *b, float x0, float y0,
@@ -101,6 +104,9 @@ nk_stroke_line(struct nk_command_buffer *b, float x0, float y0,
     cmd->end.x = (short)x1;
     cmd->end.y = (short)y1;
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_line*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_curve(struct nk_command_buffer *b, float ax, float ay,
@@ -124,6 +130,9 @@ nk_stroke_curve(struct nk_command_buffer *b, float ax, float ay,
     cmd->end.x = (short)bx;
     cmd->end.y = (short)by;
     cmd->color = col;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_curve*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_rect(struct nk_command_buffer *b, struct nk_rect rect,
@@ -147,6 +156,9 @@ nk_stroke_rect(struct nk_command_buffer *b, struct nk_rect rect,
     cmd->w = (unsigned short)NK_MAX(0, rect.w);
     cmd->h = (unsigned short)NK_MAX(0, rect.h);
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_rect*), b->crc);
+#endif
 }
 NK_API void
 nk_fill_rect(struct nk_command_buffer *b, struct nk_rect rect,
@@ -170,6 +182,9 @@ nk_fill_rect(struct nk_command_buffer *b, struct nk_rect rect,
     cmd->w = (unsigned short)NK_MAX(0, rect.w);
     cmd->h = (unsigned short)NK_MAX(0, rect.h);
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_rect_filled*), b->crc);
+#endif
 }
 NK_API void
 nk_fill_rect_multi_color(struct nk_command_buffer *b, struct nk_rect rect,
@@ -196,6 +211,9 @@ nk_fill_rect_multi_color(struct nk_command_buffer *b, struct nk_rect rect,
     cmd->top = top;
     cmd->right = right;
     cmd->bottom = bottom;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_rect_multi_color*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_circle(struct nk_command_buffer *b, struct nk_rect r,
@@ -218,6 +236,9 @@ nk_stroke_circle(struct nk_command_buffer *b, struct nk_rect r,
     cmd->w = (unsigned short)NK_MAX(r.w, 0);
     cmd->h = (unsigned short)NK_MAX(r.h, 0);
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_circle*), b->crc);
+#endif
 }
 NK_API void
 nk_fill_circle(struct nk_command_buffer *b, struct nk_rect r, struct nk_color c)
@@ -239,6 +260,9 @@ nk_fill_circle(struct nk_command_buffer *b, struct nk_rect r, struct nk_color c)
     cmd->w = (unsigned short)NK_MAX(r.w, 0);
     cmd->h = (unsigned short)NK_MAX(r.h, 0);
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_circle_filled*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_arc(struct nk_command_buffer *b, float cx, float cy, float radius,
@@ -256,6 +280,9 @@ nk_stroke_arc(struct nk_command_buffer *b, float cx, float cy, float radius,
     cmd->a[0] = a_min;
     cmd->a[1] = a_max;
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_arc*), b->crc);
+#endif
 }
 NK_API void
 nk_fill_arc(struct nk_command_buffer *b, float cx, float cy, float radius,
@@ -273,6 +300,9 @@ nk_fill_arc(struct nk_command_buffer *b, float cx, float cy, float radius,
     cmd->a[0] = a_min;
     cmd->a[1] = a_max;
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_arc_filled*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_triangle(struct nk_command_buffer *b, float x0, float y0, float x1,
@@ -300,6 +330,9 @@ nk_stroke_triangle(struct nk_command_buffer *b, float x0, float y0, float x1,
     cmd->c.x = (short)x2;
     cmd->c.y = (short)y2;
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_triangle*), b->crc);
+#endif
 }
 NK_API void
 nk_fill_triangle(struct nk_command_buffer *b, float x0, float y0, float x1,
@@ -327,6 +360,9 @@ nk_fill_triangle(struct nk_command_buffer *b, float x0, float y0, float x1,
     cmd->c.x = (short)x2;
     cmd->c.y = (short)y2;
     cmd->color = c;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_triangle_filled*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_polygon(struct nk_command_buffer *b, const float *points, int point_count,
@@ -348,6 +384,9 @@ nk_stroke_polygon(struct nk_command_buffer *b, const float *points, int point_co
         cmd->points[i].x = (short)points[i*2];
         cmd->points[i].y = (short)points[i*2+1];
     }
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_polygon*), b->crc);
+#endif
 }
 NK_API void
 nk_fill_polygon(struct nk_command_buffer *b, const float *points, int point_count,
@@ -369,6 +408,9 @@ nk_fill_polygon(struct nk_command_buffer *b, const float *points, int point_coun
         cmd->points[i].x = (short)points[i*2+0];
         cmd->points[i].y = (short)points[i*2+1];
     }
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_polygon_filled*), b->crc);
+#endif
 }
 NK_API void
 nk_stroke_polyline(struct nk_command_buffer *b, const float *points, int point_count,
@@ -390,6 +432,9 @@ nk_stroke_polyline(struct nk_command_buffer *b, const float *points, int point_c
         cmd->points[i].x = (short)points[i*2];
         cmd->points[i].y = (short)points[i*2+1];
     }
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_polyline*), b->crc);
+#endif
 }
 NK_API void
 nk_draw_image(struct nk_command_buffer *b, struct nk_rect r,
@@ -413,6 +458,9 @@ nk_draw_image(struct nk_command_buffer *b, struct nk_rect r,
     cmd->h = (unsigned short)NK_MAX(0, r.h);
     cmd->img = *img;
     cmd->col = col;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_image*), b->crc);
+#endif
 }
 NK_API void
 nk_draw_nine_slice(struct nk_command_buffer *b, struct nk_rect r,
@@ -513,6 +561,9 @@ nk_push_custom(struct nk_command_buffer *b, struct nk_rect r,
     cmd->h = (unsigned short)NK_MAX(0, r.h);
     cmd->callback_data = usr;
     cmd->callback = cb;
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_custom*), b->crc); //here be dragons
+#endif
 }
 NK_API void
 nk_draw_text(struct nk_command_buffer *b, struct nk_rect r,
@@ -554,4 +605,8 @@ nk_draw_text(struct nk_command_buffer *b, struct nk_rect r,
     cmd->height = font->height;
     NK_MEMCPY(cmd->string, string, (nk_size)length);
     cmd->string[length] = '\0';
+#ifdef NK_DRAW_CRC
+    b->crc = NK_CRC_FUNC((const void*)cmd,sizeof(nk_command_text *), b->crc); // command
+    b->crc = NK_CRC_FUNC((const void*)cmd->string,length, b->crc); //text
+#endif
 }
diff --git a/src/paq.bat b/src/paq.bat
index 65473481..e00ad363 100644
--- a/src/paq.bat
+++ b/src/paq.bat
@@ -1 +1 @@
-build.py --macro NK --intro HEADER.md --pub nuklear.h --priv1 nuklear_internal.h,nuklear_math.c,nuklear_util.c,nuklear_color.c,nuklear_utf8.c,nuklear_buffer.c,nuklear_string.c,nuklear_draw.c,nuklear_vertex.c --extern stb_rect_pack.h,stb_truetype.h --priv2 nuklear_font.c,nuklear_input.c,nuklear_style.c,nuklear_context.c,nuklear_pool.c,nuklear_page_element.c,nuklear_table.c,nuklear_panel.c,nuklear_window.c,nuklear_popup.c,nuklear_contextual.c,nuklear_menu.c,nuklear_layout.c,nuklear_tree.c,nuklear_group.c,nuklear_list_view.c,nuklear_widget.c,nuklear_text.c,nuklear_image.c,nuklear_9slice.c,nuklear_button.c,nuklear_toggle.c,nuklear_selectable.c,nuklear_slider.c,nuklear_knob.c,nuklear_progress.c,nuklear_scrollbar.c,nuklear_text_editor.c,nuklear_edit.c,nuklear_property.c,nuklear_chart.c,nuklear_color_picker.c,nuklear_combo.c,nuklear_tooltip.c --outro LICENSE,CHANGELOG,CREDITS > ..\nuklear.h
+build.py --macro NK --intro HEADER.md --pub nuklear.h --priv1 nuklear_internal.h,nuklear_crc.c,nuklear_math.c,nuklear_util.c,nuklear_color.c,nuklear_utf8.c,nuklear_buffer.c,nuklear_string.c,nuklear_draw.c,nuklear_vertex.c --extern stb_rect_pack.h,stb_truetype.h --priv2 nuklear_font.c,nuklear_input.c,nuklear_style.c,nuklear_context.c,nuklear_pool.c,nuklear_page_element.c,nuklear_table.c,nuklear_panel.c,nuklear_window.c,nuklear_popup.c,nuklear_contextual.c,nuklear_menu.c,nuklear_layout.c,nuklear_tree.c,nuklear_group.c,nuklear_list_view.c,nuklear_widget.c,nuklear_text.c,nuklear_image.c,nuklear_9slice.c,nuklear_button.c,nuklear_toggle.c,nuklear_selectable.c,nuklear_slider.c,nuklear_knob.c,nuklear_progress.c,nuklear_scrollbar.c,nuklear_text_editor.c,nuklear_edit.c,nuklear_property.c,nuklear_chart.c,nuklear_color_picker.c,nuklear_combo.c,nuklear_tooltip.c --outro LICENSE,CHANGELOG,CREDITS > ..\nuklear.h
diff --git a/src/paq.sh b/src/paq.sh
index 5e8a1da4..2b5badf3 100755
--- a/src/paq.sh
+++ b/src/paq.sh
@@ -1,2 +1,2 @@
 #!/bin/sh
-python3 build.py --macro NK --intro HEADER.md --pub nuklear.h --priv1 nuklear_internal.h,nuklear_math.c,nuklear_util.c,nuklear_color.c,nuklear_utf8.c,nuklear_buffer.c,nuklear_string.c,nuklear_draw.c,nuklear_vertex.c --extern stb_rect_pack.h,stb_truetype.h --priv2 nuklear_font.c,nuklear_input.c,nuklear_style.c,nuklear_context.c,nuklear_pool.c,nuklear_page_element.c,nuklear_table.c,nuklear_panel.c,nuklear_window.c,nuklear_popup.c,nuklear_contextual.c,nuklear_menu.c,nuklear_layout.c,nuklear_tree.c,nuklear_group.c,nuklear_list_view.c,nuklear_widget.c,nuklear_text.c,nuklear_image.c,nuklear_9slice.c,nuklear_button.c,nuklear_toggle.c,nuklear_selectable.c,nuklear_slider.c,nuklear_knob.c,nuklear_progress.c,nuklear_scrollbar.c,nuklear_text_editor.c,nuklear_edit.c,nuklear_property.c,nuklear_chart.c,nuklear_color_picker.c,nuklear_combo.c,nuklear_tooltip.c --outro LICENSE,CHANGELOG,CREDITS > ../nuklear.h
+python3 build.py --macro NK --intro HEADER.md --pub nuklear.h --priv1 nuklear_internal.h,nuklear_math.c,nuklear_util.c,nuklear_crc.c,nuklear_color.c,nuklear_utf8.c,nuklear_buffer.c,nuklear_string.c,nuklear_draw.c,nuklear_vertex.c --extern stb_rect_pack.h,stb_truetype.h --priv2 nuklear_font.c,nuklear_input.c,nuklear_style.c,nuklear_context.c,nuklear_pool.c,nuklear_page_element.c,nuklear_table.c,nuklear_panel.c,nuklear_window.c,nuklear_popup.c,nuklear_contextual.c,nuklear_menu.c,nuklear_layout.c,nuklear_tree.c,nuklear_group.c,nuklear_list_view.c,nuklear_widget.c,nuklear_text.c,nuklear_image.c,nuklear_9slice.c,nuklear_button.c,nuklear_toggle.c,nuklear_selectable.c,nuklear_slider.c,nuklear_knob.c,nuklear_progress.c,nuklear_scrollbar.c,nuklear_text_editor.c,nuklear_edit.c,nuklear_property.c,nuklear_chart.c,nuklear_color_picker.c,nuklear_combo.c,nuklear_tooltip.c --outro LICENSE,CHANGELOG,CREDITS > ../nuklear.h