Hi, I've been poking around at HTTP/2 a lot lately, and it seems that so long as you are using libcurl 7.43.0+ it's possible to do request multiplexing.
This change simply introduces three constants, CURLPIPE_NOTHING (0), CURLPIPE_HTTP1 (1), and CURLPIPE_MULTIPLEX (2) which represent possible values passed into curl_multi_setopt() for the CURLMOPT_PIPELINING option. Current behavior of passing in 0 and 1 map to the first two constants, while the third allows for multiplexing. Now, of course, being constants, you can just pass in 0, 1, or 2, but this brings the consistency and explicitness of exposing them as with all the other curl constants. I'd love to see this make it into PHP 7.0 if it's not too late? It's extremely trivial, but whatever — not that fussed :) PR is here: https://github.com/php/php-src/pull/1497 I'm not sure if there is some way to ensure that libcurl is compiled with nghttp, but we don't check for the other HTTP/2 stuff so either it's done elsewhere and I missed it, or we're making assumptions that the right version is enough. Any input on this would be good. FTR, multiplexing can bring substantial performance improvements, especially when factoring in SSL: 379 HTTP SSL requests Using HTTP/2 in serial: 63.293796062469 (HTTP/1.1 in serial should be even slower) Using HTTP/1.1 with curl_multi: 12.383034944534 Using HTTP/2 w/multiplexing: 2.7933928966522 Thanks, - Davey
