benchmark

Benchmarks

Callback dispatch throughput benchmarks comparing ext-eventloop with Revolt across all available drivers.

Setup

cd benchmark
composer install

For Revolt driver comparison, install the desired extensions:

pecl install ev        # EvDriver
pecl install event     # EventDriver (requires libevent)
pecl install uv-beta   # UvDriver (requires libuv)

Running

# ext-eventloop (requires ext-eventloop installed)
php bench_eventloop.php [iterations]

# Revolt drivers
php bench_revolt_stream_select.php [iterations]
php bench_revolt_ev.php [iterations]
php bench_revolt_event.php [iterations]
php bench_revolt_uv.php [iterations]

Default: 100,000 iterations.

What is measured

Benchmark	What it tests
defer()	Queue and dispatch deferred callbacks
delay(0)	Schedule and fire zero-delay timers
repeat(0)	Repeated timer dispatch throughput
I/O register + cancel	onReadable registration and cancellation overhead
Fiber suspend/resume	Fiber context switching via Suspension

These benchmarks measure callback dispatch overhead — how fast the loop can register, schedule, and invoke callbacks. The I/O backend primarily affects polling efficiency at high concurrency, not dispatch speed.

File structure

File	Description
bench.php	Shared benchmark logic
bench_eventloop.php	ext-eventloop entry point
bench_revolt_stream_select.php	Revolt StreamSelectDriver
bench_revolt_ev.php	Revolt EvDriver (pecl/ev)
bench_revolt_event.php	Revolt EventDriver (pecl/event)
bench_revolt_uv.php	Revolt UvDriver (pecl/uv)