# Question regarding stream wrappers and op code cache - Thread: https://externals.io/message/81746 - Original archive: https://news-web.php.net/php.internals/81746 - Started by Cesar Rodas on 2015-02-03T23:26:50+00:00 - Messages: 6 - Reply by email to internals@lists.php.net - More for agents: search with https://externals.io/search.md?q={query} · JSON API at https://externals.io/api · documentation at https://externals.io/llms.txt --- ## #81746 — Cesar Rodas — 2015-02-03T23:26:50+00:00 URL: https://externals.io/message/81746#81746 Hi Guys, I have a doubt, is it efficient include/require files from a source different than the "real file system" a stream wrapper class? My question is, would the op-code cache work as it would when reading a file form the filesystem? Cheers, -- César D. Rodas Open Source developer +595-983-161124 PGP: F9ED A265 A3AB C8A1 D145 7368 158A 0336 C707 0AA6 --- ## #81747 — Leigh — 2015-02-03T23:55:33+00:00 URL: https://externals.io/message/81746#81747 · In reply to: #81746 > Hi Guys, > > I have a doubt, is it efficient include/require files from a source > different than the "real file system" a stream wrapper class? My > question is, would the op-code cache work as it would when reading a > file form the filesystem? > Do you mean if you `include 'mystream://something.php'; ? Interesting question. I'd like to think that when opcache tries to stat the file that streamWrapper::url_stat is called, and keeping the mtime the same will cause the cached version to be used. Really no idea though, I'd like to know the answer too. --- ## #81748 — Cesar Rodas — 2015-02-03T23:56:36+00:00 URL: https://externals.io/message/81746#81748 · In reply to: #81747 > > > […] > Do you mean if you `include 'mystream://something.php'; ? Yes, that's exactly what I *tried* to ask! > > Interesting question. I'd like to think that when opcache tries to > stat the file that streamWrapper::url_stat is called, and keeping the > mtime the same will cause the cached version to be used. > > Really no idea though, I'd like to know the answer too. Let's wait then! Cheers, -- César D. Rodas Open Source developer +595-983-161124 PGP: F9ED A265 A3AB C8A1 D145 7368 158A 0336 C707 0AA6 --- ## #81756 — reeze — 2015-02-04T03:02:14+00:00 URL: https://externals.io/message/81746#81756 · In reply to: #81746 Hi Cesar, > Hi Guys, > > I have a doubt, is it efficient include/require files from a source > different than the "real file system" a stream wrapper class? My > question is, would the op-code cache work as it would when reading a > file form the filesystem? > Yes it works if you are using 'phar' stream wrapper, the rest wrappers are not cached, @see https://github.com/php/php-src/blob/master/ext/opcache/ZendAccelerator.c#L138-L142 This RFC: https://wiki.php.net/rfc/streams-is-cacheable is aim to remove the restriction and allow stream wrapper itself to decide should it been cached by opcache. > > Cheers, > > -- > César D. Rodas > Open Source developer > +595-983-161124 > PGP: F9ED A265 A3AB C8A1 D145 7368 158A 0336 C707 0AA6 --- ## #81775 — francois@tekwire.net — 2015-02-04T07:19:09+00:00 URL: https://externals.io/message/81746#81775 · In reply to: #81746 > De : Cesar Rodas [mailto:cesar@rodas.me] > I have a doubt, is it efficient include/require files from a source > different than the "real file system" a stream wrapper class? My > question is, would the op-code cache work as it would when reading a > file form the filesystem? I understand your question but, yes, the feature is essential to packages systems like phar and phk (and it is useless for most other stream wrappers). Package systems distribute a virtual file tree, handle `stat()`, and returning valid mtimes. So, the opcode cache must be able to work with these stream wrappers. Regards François --- ## #81822 — Cesar Rodas — 2015-02-04T16:14:05+00:00 URL: https://externals.io/message/81746#81822 · In reply to: #81775 > > […] > I understand your question but, yes, the feature is essential to packages systems like phar and phk (and it is useless for most other stream wrappers). Package systems distribute a virtual file tree, handle `stat()`, and returning valid mtimes. So, the opcode cache must be able to work with these stream wrappers. I'm working on a project to *put* all generated code inside a single file (and expose through "generated://doctrine" or "generated://") but it's pointless if the compiled op-code is not cached :-( I believe this https://wiki.php.net/rfc/streams-is-cacheable would be brilliant! Cheers, > > Regards > > François > > -- César D. Rodas Open Source developer +595-983-161124 PGP: F9ED A265 A3AB C8A1 D145 7368 158A 0336 C707 0AA6