Revert "perf: disable snapshot compression (#18061)" (#18074)

This reverts commit d12b039e1ad601622c6135e13f00fd14cb09bce1.

It was landed as an experiment and it confirms much faster startup
if not compression is applied.

1 files changed, 8 insertions, 1 deletions

diff --git a/cli/build.rs b/cli/build.rs
index ddcd08778..956293b78 100644
--- a/cli/build.rs
+++ b/cli/build.rs
@@ -378,7 +378,14 @@ fn create_cli_snapshot(snapshot_path: PathBuf) {
     startup_snapshot: Some(deno_runtime::js::deno_isolate_init()),
     extensions,
     extensions_with_js,
-    compression_cb: None,
+    compression_cb: Some(Box::new(|vec, snapshot_slice| {
+      lzzzz::lz4_hc::compress_to_vec(
+        snapshot_slice,
+        vec,
+        lzzzz::lz4_hc::CLEVEL_MAX,
+      )
+      .expect("snapshot compression failed");
+    })),
     snapshot_module_load_cb: None,
   })
 }