commit | 8178fdea4046837c4855e06d67c373543b9ffcbc | [log] [tgz] |
---|---|---|
author | Nate Biggs <natebiggs@google.com> | Wed Apr 06 20:11:54 2022 +0000 |
committer | Commit Bot <commit-bot@chromium.org> | Wed Apr 06 20:11:54 2022 +0000 |
tree | 909dfd04d310ca02269b80b69f0bc57cca4fd2f6 | |
parent | f520683b6eb8ec6160f5d9d0643c76260973b45d [diff] |
[dart2js] Add second level of lowering transformation for async -> future. This handles the case where all 'await' expressions are (direct) children of return statements (i.e. of the form: return await e). In this case we can drop all the awaits and return the operands directly. We make sure to wrap each operand in Future.value since it might not be already be a future. We also make sure to wrap any extra returns with Future.value. Tested on cm_shell with the following results: Before: Compiled 243,799,156 characters Dart to 155,109,419 characters JavaScript After: Compiled 243,799,156 characters Dart to 154,742,407 characters JavaScript Reduced output size by ~0.2%. Later iterations of this will reduce JS size by ~0.7%. Change-Id: I43a29d2e843c316c7b61f6daceb8b0e855931eb5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/239120 Reviewed-by: Joshua Litt <joshualitt@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com> Commit-Queue: Nate Biggs <natebiggs@google.com>
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