Increasing Ruby's Net::BufferedIO buffer size

Reading bytes from Net::HTTP seems really slow, around 1Mb/s for a close host. Not many people seem to have complained about this, but I found some insight from Headius and monkey-patched Net::BufferedIO::rbuf_fill. Changing the read buffer size from 1k to 32k brought the throughput up to 24Mb/s.

module Net
  class BufferedIO
    def rbuf_fill
      timeout(@read_timeout) { @rbuf << @io.sysread(32768) }
    end
  end
end

Documenting code

It’s said that code should be written for people to read, so it follows that documentation is written for no one to read.