ci: speed up conformance with thin lto (#3773)

Author: Boshen

.cargo/config.toml

@@ -3,7 +3,7 @@
 ck = "check --workspace --all-features --all-targets --locked"
 lint = "clippy --workspace --all-targets --all-features"
 codecov = "llvm-cov --workspace --ignore-filename-regex tasks"
-coverage = "run -p oxc_coverage --release --"
+coverage = "run -p oxc_coverage --profile release-thin --"
 benchmark = "run -p oxc_benchmark --release --"
 minsize = "run -p oxc_minsize --release --"
 rule = "run -p rulegen"

Cargo.toml

@@ -202,3 +202,8 @@ codegen-units = 1
 strip         = "symbols" # set to `false` for debug information
 debug         = false # set to `true` for debug information
 panic         = "abort" # Let it crash and force ourselves to write safe Rust.
+
+# Faster compile time with thin lto
+[profile.release-thin]
+inherits = "release"
+lto      = "thin"