From d12b039e1ad601622c6135e13f00fd14cb09bce1 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Bartek=20Iwa=C5=84czuk?= Date: Tue, 7 Mar 2023 08:57:58 -0400 Subject: perf: disable snapshot compression (#18061) This commit disables snapshot compression for the CLI snapshot.] Decompressing the snapshot on startup takes ~2.5ms. --- runtime/js.rs | 33 ++------------------------------- 1 file changed, 2 insertions(+), 31 deletions(-) (limited to 'runtime/js.rs') diff --git a/runtime/js.rs b/runtime/js.rs index 57b1e7be4..3101e4b6b 100644 --- a/runtime/js.rs +++ b/runtime/js.rs @@ -1,43 +1,14 @@ // Copyright 2018-2023 the Deno authors. All rights reserved. MIT license. #[cfg(not(feature = "dont_create_runtime_snapshot"))] use deno_core::Snapshot; -#[cfg(not(feature = "dont_create_runtime_snapshot"))] -use log::debug; -#[cfg(not(feature = "dont_create_runtime_snapshot"))] -use once_cell::sync::Lazy; #[cfg(not(feature = "dont_create_runtime_snapshot"))] -static COMPRESSED_RUNTIME_SNAPSHOT: &[u8] = +static RUNTIME_SNAPSHOT: &[u8] = include_bytes!(concat!(env!("OUT_DIR"), "/RUNTIME_SNAPSHOT.bin")); -#[cfg(not(feature = "dont_create_runtime_snapshot"))] -pub static RUNTIME_SNAPSHOT: Lazy> = Lazy::new( - #[allow(clippy::uninit_vec)] - #[cold] - #[inline(never)] - || { - let size = - u32::from_le_bytes(COMPRESSED_RUNTIME_SNAPSHOT[0..4].try_into().unwrap()) - as usize; - let mut vec = Vec::with_capacity(size); - - // SAFETY: vec is allocated with exact snapshot size (+ alignment) - // SAFETY: non zeroed bytes are overwritten with decompressed snapshot - unsafe { - vec.set_len(size); - } - - lzzzz::lz4::decompress(&COMPRESSED_RUNTIME_SNAPSHOT[4..], &mut vec) - .unwrap(); - - vec.into_boxed_slice() - }, -); - #[cfg(not(feature = "dont_create_runtime_snapshot"))] pub fn deno_isolate_init() -> Snapshot { - debug!("Deno isolate init with snapshots."); - Snapshot::Static(&RUNTIME_SNAPSHOT) + Snapshot::Static(RUNTIME_SNAPSHOT) } #[cfg(not(feature = "include_js_files_for_snapshotting"))] -- cgit v1.2.3