build: add "include_js_files_for_snapshotting" Cargo feature (#17826)

This allows to not include source code into the binary (because
it will already be included in the V8 snapshot).

Nothing changes for the embedders - everything should still build the
same.

This commit brings the binary size from 87Mb to 82Mb on M1.

Alternative to https://github.com/denoland/deno/pull/17820 and
https://github.com/denoland/deno/pull/17653

---------

Co-authored-by: Leo Kettmeir <crowlkats@toaxl.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/core/snapshot_util.rs b/core/snapshot_util.rs
index a4bf80227..5b0ba92a0 100644
--- a/core/snapshot_util.rs
+++ b/core/snapshot_util.rs
@@ -33,6 +33,12 @@ pub fn create_snapshot(create_snapshot_options: CreateSnapshotOptions) {
     snapshot_module_load_cb: create_snapshot_options.snapshot_module_load_cb,
     ..Default::default()
   });
+  println!(
+    "JsRuntime for snapshot prepared, took {:#?} ({})",
+    Instant::now().saturating_duration_since(mark),
+    create_snapshot_options.snapshot_path.display()
+  );
+  mark = Instant::now();
 
   let snapshot = js_runtime.snapshot();
   let snapshot_slice: &[u8] = &snapshot;