Symbol minification (#2695)

* minify

* Update renamer.zig

* --minify-whitespace

* Speed up minification a little

* handle private names

* 5% faster minification

* use helper function

* fix nested scope slots

* `bun build --minify` gets another +8% faster

* print semicolons afterwards

* print semicolon after checking error

* after all error checking

* Delete code for generating legacy bundes

* remove extra whitespace around if statements

* print space before import identifier

* Use `@constCast`

* Make `S.Local#decls` use `BabyList(Decl)`

* Add `fromSlice` helper to `BabyList`

* Remove unnecessary optional chains

* minify `undefined, true, false`

* Another @constCast

* Implement merge adjacent local var

* Support --minify in `bun build --transform`

* skip comments when counting character frequencies

* Don't wrap commonjs with --transform on (unless targeting bun)

* Support --minify in the runtime

* Fix edgecase with import * as

* don't infinite loop

* --trnasform shouldn't mess with require

* Only track comments when minifying

---------

Co-authored-by: Jarred Sumner <709451+Jarred-Sumner@users.noreply.github.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/src/bun.js/module_loader.zig b/src/bun.js/module_loader.zig
index ee1f392c5..127bc85e3 100644
--- a/src/bun.js/module_loader.zig
+++ b/src/bun.js/module_loader.zig
@@ -1606,6 +1606,8 @@ pub const ModuleLoader = struct {
                     opts.features.hot_module_reloading = false;
                     opts.features.top_level_await = true;
                     opts.features.react_fast_refresh = false;
+                    opts.features.minify_identifiers = bundler.options.minify_identifiers;
+                    opts.features.minify_syntax = bundler.options.minify_syntax;
                     opts.filepath_hash_for_hmr = 0;
                     opts.warn_about_unbundled_modules = false;
                     opts.macro_context = &jsc_vm.bundler.macro_context.?;