tree 3cce5a5ffd62399af4adc545ec8d0d410048df6e
parent f5acee902c4d2110f671455460172cb6d3bf5b73
author Snappy Team <no-reply@google.com> 1578670890 -0800
committer Victor Costan <pwnall@chromium.org> 1579028322 -0800

Optimize IncrementalCopy: There are between 1 and 4 copy iterations. Allow FDO to work with full knowledge of the probabilities for each branch.

On skylake, this improves protobuf and html decompression speed by 15% and 9% respectively, and the rest by ~2%.
On haswell, this improves protobuf and html decompression speed by 23% and 16% respectively, and the rest by ~3%.

PiperOrigin-RevId: 289090401