Re: Why PHP 7 yield from still single thread and blocking thread?

Hi Netroby, > I wrote a small test. to see if it really concurrent processing any tasks. > the result looks bad. Still single blocking thread. > As the RFC already states: The actual implementation of coroutine task schedulers is outside the scope > of this document. This RFC focuses only on the language-level machinery > needed to make such tools more feasible in userland. It should be obvious > that simply moving code into a generator function will not somehow make it > magically concurrent. You need a task scheduler like Amp (https://github.com/amphp/amp). With Amp, you code would look like: <?php > > function delayYield() { > $delay = mt_rand(1, 5); > echo "Delay $delay seconds" . PHP_EOL; > yield new Amp\Pause($delay * 1000); // <-- Note: It's not using a > synchrnous sleep here! > return date('Y-m-d H:i:s'); > } > > Amp\run(function() { > $promises = []; > for ($i = 0; $i < 3; $i++) { > $promises[] = Amp\resolve(delayYield()); // turns the generator > into a promise so they're combinable with Amp\all > } > $dates = yield Amp\all($promises); > }); > yield from is more to factor larger functions into smaller units than directly for doing tasks asynchronously. Regards, Niklas