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Revert "perf: disable TSC snapshot compression (#18333)" (#18336)

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This reverts commit 0d27de943a.
This commit is contained in:
Bartek Iwańczuk 2023-03-21 20:11:22 +01:00 • committed by GitHub
parent a561cc28cd
commit cc46f6776c
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5 changed files with 94 additions and 3 deletions
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28
cli/tsc/mod.rs
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@ -52,8 +52,30 @@ pub use self::diagnostics::DiagnosticMessageChain;
pub use self::diagnostics::Diagnostics;
pub use self::diagnostics::Position;
pub static COMPILER_SNAPSHOT: &[u8] =
include_bytes!(concat!(env!("OUT_DIR"), "/COMPILER_SNAPSHOT.bin"));
pub static COMPILER_SNAPSHOT: Lazy<Box<[u8]>> = Lazy::new(
#[cold]
#[inline(never)]
|| {
static COMPRESSED_COMPILER_SNAPSHOT: &[u8] =
include_bytes!(concat!(env!("OUT_DIR"), "/COMPILER_SNAPSHOT.bin"));
// NOTE(bartlomieju): Compressing the TSC snapshot in debug build took
// ~45s on M1 MacBook Pro; without compression it took ~1s.
// Thus we're not not using compressed snapshot, trading off
// a lot of build time for some startup time in debug build.
#[cfg(debug_assertions)]
return COMPRESSED_COMPILER_SNAPSHOT.to_vec().into_boxed_slice();
#[cfg(not(debug_assertions))]
zstd::bulk::decompress(
&COMPRESSED_COMPILER_SNAPSHOT[4..],
u32::from_le_bytes(COMPRESSED_COMPILER_SNAPSHOT[0..4].try_into().unwrap())
as usize,
)
.unwrap()
.into_boxed_slice()
},
);
pub fn get_types_declaration_file_text(unstable: bool) -> String {
let mut assets = get_asset_texts_from_new_runtime()
@ -115,7 +137,7 @@ fn get_asset_texts_from_new_runtime() -> Result<Vec<AssetText>, AnyError> {
}
pub fn compiler_snapshot() -> Snapshot {
Snapshot::Static(COMPILER_SNAPSHOT)
Snapshot::Static(&COMPILER_SNAPSHOT)
}
macro_rules! inc {