This switches the decoder from using an Emscripten compile to a hand port. The encoder is still compiled with Emscripten.
There are a number of advantages to this:
Much smaller code. The hand ported decoder is less than half the size of the Emscripten version when minified.
Less memory usage. See #3.
Hand port is significantly faster than Emscripten compile with almost no hand optimization:
Hand Port x 99.29 ops/sec ±0.59% (72 runs sampled)
Emscripten x 40.81 ops/sec ±0.68% (54 runs sampled)
Hand Port is the fastest
Emscripten is 59% slower
This port was originally done a while ago, and I'm just getting around to finishing it up. Therefore, it is based on an old version of the C decoder. Most of the changes since then have to do with streaming support, which isn't supported here (yet). I did, however, port back the functional decoding changes to support the latest spec. The JS version passes all tests from the latest Brotli decoder test suite.
behdad
commented
8 years ago
This switches the decoder from using an Emscripten compile to a hand port. The encoder is still compiled with Emscripten.
There are a number of advantages to this:
Hand port is significantly faster than Emscripten compile with almost no hand optimization:
This port was originally done a while ago, and I'm just getting around to finishing it up. Therefore, it is based on an old version of the C decoder. Most of the changes since then have to do with streaming support, which isn't supported here (yet). I did, however, port back the functional decoding changes to support the latest spec. The JS version passes all tests from the latest Brotli decoder test suite.