This Runs Slower than just running cURL to post logs to the HTTP Listener

Benchmarking on 50 users with a 100 loop count, I get far worse results using this vs cURL. Whereas cURL consistently gives me response times of around 10ms total load time per page on a page where not much is happening, using fluent-logger-php instead immediately increases average load times to about 600ms (all goes well with 10ms response times until about the 200th sample, at which point response times erratically grow into the thousands of ms. I'm guessing this is a buffering issue?