Optimize release build size

Author: fox34

Cargo.toml

@@ -7,10 +7,13 @@ edition = '2024'
 
 # https://github.com/johnthagen/min-sized-rust
 [profile.release]
-lto = true          # Enable link-time optimization
-codegen-units = 1   # Reduce number of codegen units to increase optimizations
-panic = 'abort'     # Abort on panic
-strip = true        # Strip symbols from binary
+codegen-units = 1           # reduces binary size by ~2%
+debug = "full"              # No one needs an undebuggable release binary
+lto = true                  # reduces binary size by ~14%
+opt-level = "s"             # reduces binary size by ~25%
+panic = "abort"             # reduces binary size by ~50% in combination with -Zbuild-std-features=panic_immediate_abort
+split-debuginfo = "packed"  # generates a seperate *.dwp/*.dSYM so the binary can get stripped
+strip = "symbols"           # See split-debuginfo - allows us to drop the size by ~65%
 
 [dependencies]
 axum = "0.8"