perf: experiment monomorphized generics share (lightningcss)

crates/rspack_browserslist/Cargo.toml

@@ -12,7 +12,7 @@ version.workspace       = true
 
 [dependencies]
 browserslist-rs = { workspace = true }
-lightningcss    = { workspace = true }
+lightningcss    = { path = "../rspack_monomorphized_lightningcss", package = "rspack_monomorphized_lightningcss" }
 regex           = { workspace = true }
 
 [lints]

crates/rspack_cacheable/Cargo.toml

@@ -16,7 +16,7 @@ hashlink        = { workspace = true }
 indexmap        = { workspace = true }
 inventory       = { workspace = true }
 json            = { workspace = true }
-lightningcss    = { workspace = true }
+lightningcss    = { path = "../rspack_monomorphized_lightningcss", package = "rspack_monomorphized_lightningcss" }
 once_cell       = { workspace = true }
 rkyv            = { workspace = true }
 rspack_macros   = { workspace = true }

crates/rspack_loader_lightningcss/Cargo.toml

@@ -10,7 +10,7 @@ version.workspace = true
 [dependencies]
 async-trait          = { workspace = true }
 derive_more          = { workspace = true, features = ["debug"] }
-lightningcss         = { workspace = true, features = ["sourcemap", "into_owned"] }
+lightningcss         = { path = "../rspack_monomorphized_lightningcss", package = "rspack_monomorphized_lightningcss", features = ["sourcemap", "into_owned"] }
 parcel_sourcemap     = { workspace = true }
 rspack_browserslist  = { workspace = true }
 rspack_cacheable     = { workspace = true }

crates/rspack_monomorphized_lightningcss/Cargo.toml

@@ -0,0 +1,20 @@
+[package]
+name = "rspack_monomorphized_lightningcss"
+authors.workspace = true
+categories.workspace = true
+documentation.workspace = true
+edition.workspace = true
+homepage.workspace = true
+license.workspace = true
+repository.workspace = true
+version.workspace = true
+
+[dependencies]
+lightningcss = { workspace = true, default-features = false }
+
+[features]
+sourcemap = ["lightningcss/sourcemap"]
+into_owned = ["lightningcss/into_owned"]
+
+[lints]
+workspace = true

crates/rspack_monomorphized_lightningcss/src/lib.rs

@@ -0,0 +1,13 @@
+pub use lightningcss::*;
+
+pub fn monomorphized(black_box: fn(*const ())) {
+  black_box(<lightningcss::stylesheet::StyleSheet<'_, '_>>::minify as *const ());
+  black_box(<lightningcss::properties::Property as core::clone::Clone>::clone as *const ());
+  black_box(<lightningcss::rules::CssRule as core::clone::Clone>::clone as *const ());
+  black_box(<lightningcss::rules::CssRuleList as lightningcss::traits::ToCss>::to_css::<String> as *const ());
+  black_box(<lightningcss::rules::font_face::FontFaceRule as lightningcss::traits::ToCss>::to_css::<String> as *const ());
+  black_box(<lightningcss::properties::masking::ClipPath as core::clone::Clone>::clone as *const ());
+  black_box(<lightningcss::properties::Property as core::cmp::PartialEq>::eq as *const ());
+  black_box(<lightningcss::properties::masking::ClipPath as core::cmp::PartialEq>::eq as *const ());
+  black_box(<lightningcss::properties::PropertyId as core::clone::Clone>::clone as *const ());
+}

crates/rspack_plugin_lightning_css_minimizer/Cargo.toml

@@ -8,7 +8,7 @@ version.workspace = true
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-lightningcss     = { workspace = true, features = ["sourcemap"] }
+lightningcss     = { features = ["sourcemap"], path = "../rspack_monomorphized_lightningcss", package = "rspack_monomorphized_lightningcss" }
 parcel_sourcemap = { workspace = true }
 rayon            = { workspace = true }
 regex            = { workspace = true }