Optimize release binary size (16MB → 9MB)

Enable LTO, single codegen unit, symbol stripping, and panic=abort
in the release profile. Trim tokio features to only what's needed.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Cargo.lock

@@ -1319,15 +1319,6 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "92daf443525c4cce67b150400bc2316076100ce0b3686209eb8cf3c31612e6f0"
 
-[[package]]
-name = "lock_api"
-version = "0.4.14"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "224399e74b87b5f3557511d98dff8b14089b3dadafcab6bb93eab67d3aace965"
-dependencies = [
- "scopeguard",
-]
-
 [[package]]
 name = "log"
 version = "0.4.29"
@@ -1493,29 +1484,6 @@ version = "2.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f38d5652c16fde515bb1ecef450ab0f6a219d619a7274976324d5e377f7dceba"
 
-[[package]]
-name = "parking_lot"
-version = "0.12.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "93857453250e3077bd71ff98b6a65ea6621a19bb0f559a85248955ac12c45a1a"
-dependencies = [
- "lock_api",
- "parking_lot_core",
-]
-
-[[package]]
-name = "parking_lot_core"
-version = "0.9.12"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2621685985a2ebf1c516881c026032ac7deafcda1a2c9b7850dc81e3dfcb64c1"
-dependencies = [
- "cfg-if",
- "libc",
- "redox_syscall",
- "smallvec",
- "windows-link",
-]
-
 [[package]]
 name = "pem"
 version = "3.0.6"
@@ -1708,15 +1676,6 @@ dependencies = [
  "yasna",
 ]
 
-[[package]]
-name = "redox_syscall"
-version = "0.5.18"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed2bf2547551a7053d6fdfafda3f938979645c44812fbfcda098faae3f1a362d"
-dependencies = [
- "bitflags",
-]
-
 [[package]]
 name = "regex-automata"
 version = "0.4.14"
@@ -1877,12 +1836,6 @@ dependencies = [
  "windows-sys 0.61.2",
 ]
 
-[[package]]
-name = "scopeguard"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
-
 [[package]]
 name = "security-framework"
 version = "3.7.0"
@@ -2216,7 +2169,6 @@ dependencies = [
  "bytes",
  "libc",
  "mio",
- "parking_lot",
  "pin-project-lite",
  "signal-hook-registry",
  "socket2",

Cargo.toml

@@ -3,6 +3,12 @@ name = "certforge"
 version = "0.1.0"
 edition = "2024"
 
+[profile.release]
+lto = true            # link-time optimization — enables cross-crate dead code elimination
+codegen-units = 1     # single codegen unit — better optimization at cost of compile time
+strip = true          # strip debug symbols and metadata
+panic = "abort"       # no unwinding machinery — smaller binary, simpler code
+
 [dependencies]
 # ACME
 instant-acme = "0.8"
@@ -22,7 +28,7 @@ hex = "0.4"
 rustls-pki-types = "1"
 
 # Async
-tokio = { version = "1", features = ["full"] }
+tokio = { version = "1", features = ["macros", "rt-multi-thread", "net", "time", "process", "io-util"] }
 
 # CLI
 clap = { version = "4", features = ["derive"] }