make rom faster

Cargo.toml

@@ -2,6 +2,7 @@
 name = "picorom-rs"
 version = "0.1.0"
 edition = "2024"
+license = "MIT or Apache-2.0"
 
 [lints.clippy]
 pedantic = "warn"
@@ -14,6 +15,7 @@ test = false
 bench = false
 
 [dependencies]
+cortex-m = "0.7"
 cortex-m-rt = "0.7"
 embassy-rp = { version = "0.8", features = [
   "time-driver",
@@ -26,9 +28,12 @@ embassy-rp = { version = "0.8", features = [
 embassy-executor = { version = "0.9", features = [
   "defmt",
   "executor-thread",
-  "executor-interrupt",
   "arch-cortex-m",
 ] }
+embassy-time = { version = "0.5", features = [
+  "defmt",
+  "defmt-timestamp-uptime-tus",
+] }
 embassy-usb = { version = "0.5", default-features = false, features = [
   "defmt",
 ] }
@@ -51,7 +56,7 @@ codegen-units = 1
 debug = 2
 debug-assertions = true
 incremental = false
-opt-level = 3
+opt-level = 'z'
 overflow-checks = true
 
 # cargo build/run --release