Commits on Oct 23, 2023

1. Optimize CodedBufferWriter._copyInto to memcpy …

   dart2wasm currently can't optimize loops into memcpy, however `setRange`
   methods have type tests to generate `array.copy` (Wasm's `memcpy`).
   
   Replacing the loops in `CodedBufferWriter._copyInto` with `setRange`
   improves an internal benchmark extracted from a real use case
   significantly in all targets:
   
   |                              | Before     | After      | Diff                |
   |------------------------------|------------|------------|---------------------|
   | AOT                          | 127,587 us | 95,634 us  | -31,953 us,  -25.0% |
   | JIT                          | 106,880 us | 92,800 us  | -14,080 us,  -13.1% |
   | dart2js -O4                  | 285,587 us | 262,222 us | -23,365 us,  -8.1%  |
   | dart2wasm --omit-type-checks | 337,000 us | 236,100 us | -100,900 us, -29.9% |

   

   osa1 committed Oct 23, 2023
   Configuration menu

   • View commit details
   • Copy full SHA for 397d809
   • Browse repository at this point

   Copy the full SHA

   397d809 View commit details

   Browse the repository at this point in the history