Summary:

Related: #166206

We recently disabled bfetch/bsearch in serverless (#183096). As part of this investigation (#166206 (comment)) we analyzed performance in an http2 environment without bfetch, and found no regressions (and possibly some performance gains). We would like to move forward with removing bfetch/bsearch for a few reasons:

1. It is middleware that is no longer necessary in an http2 environment
2. It adds significant complexity to the codebase & search services
3. It creates a burden for support cases (having to disable compression for troubleshooting)
4. It bypasses the core http router APIs