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405a03909c
Intercept all `Utf8Decoder.convert` calls to check the input type and
call the right UTF8 decoder function.
This currently only optimizes `U8List` parsing, and only the fastest
path where the input is an ASCII string. Follow-up CLs will optimize JS
typed array parsing by calling browser's UTF8 decoder and the slow paths
of non-ASCII and malformed buffers.
Results from an internal benchmark extracted from a real use case:
Before:
Parse(RunTime): 330,500 us.
After:
Parse(RunTime): 90,310 us. (-72%)
dart2js -O4 results of the same benchmark:
Parse(RunTime): 234,250 us.
Change-Id: I470697a9eb516e1e031e9b865ddb29e8f25569bf
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/331187
Commit-Queue: Ömer Ağacan <omersa@google.com>
Reviewed-by: Jackson Gardner <jacksongardner@google.com>
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| .. | ||
| _http | ||
| _internal | ||
| _wasm | ||
| async | ||
| cli | ||
| collection | ||
| convert | ||
| core | ||
| developer | ||
| ffi | ||
| html | ||
| indexed_db | ||
| internal | ||
| io | ||
| isolate | ||
| js | ||
| js_interop | ||
| js_interop_unsafe | ||
| js_util | ||
| math | ||
| mirrors | ||
| svg | ||
| typed_data | ||
| vmservice | ||
| web_audio | ||
| web_gl | ||
| web_sql | ||
| analysis_options.yaml | ||
| libraries.json | ||
| libraries.yaml | ||
| PRESUBMIT.py | ||
| vmservice_libraries.json | ||
| vmservice_libraries.yaml | ||