Thoughts on Conduits
Summary: I'm growing increasingly fond of the Conduit library. Here I give my intuitions and some hints I'd have found useful. Recently I've been working on converting the Hoogle database generation to use the Conduit abstraction, in an effort to reduce the memory and improve the speed. It worked - database generation has gone from 2Gb of RAM to 320Mb, and time has dropped from several minutes (or
IAP: conduit stream fusion - FP Complete
Both the changes described in this blog post, and in the previous blog post, are now merged to the master branch of conduit, and have been released to Hackage as conduit 1.2.0. That doesn’t indicate stream fusion is complete (far from it!). Rather, the optimizations we have so far are valuable enough that I want them to be available immediately, and future stream fusion work is highly unlikely to
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ã“ã®è¨˜äº‹ã¯ http://www.yesodweb.com/blog/2012/06/conduit-0-5 ã®ç¿»è¨³ã§ã™ã€‚ conduit-0.5 をリリースã—ã¾ã—ãŸã€‚ conduitã¯ã‚¹ãƒˆãƒªãƒ¼ãƒ データを扱ã†ãŸã‚ã®ãƒ©ã‚¤ãƒ–ラリã§ã™ã€‚ conduitを用ã„ã‚‹ã¨ã€æ§˜ã€…ãªå½¢ã®ãƒ‡ãƒ¼ã‚¿ã‚’生æˆã€å¤‰å½¢ã€æ¶ˆè²»ã™ã‚‹ã‚ˆã†ãªå‡¦ç†ã‚’〠簡å˜ã«çµ„ã¿åˆã‚ã›ã‚‹ã“ã¨ãŒã§ãるよã†ã«ãªã‚Šã¾ã™ã€‚ enumerator/iterateeパラダイムã¨åŒã˜å•é¡Œã‚’解決ã™ã‚‹ã“ã¨ã‚’目的ã«ä½œã‚‰ã‚Œã¾ã—ãŸãŒã€ アプãƒãƒ¼ãƒã¯ã“れらã®ã‚‚ã®ã¨ã¯ç•°ãªã‚Šã¾ã™ã€‚ conduitã¯ç°¡å˜ã«ç†è§£ã—ã¦åˆ©ç”¨ã§ãã‚‹ã‚‚ã®ã«ãªã‚‹ã“ã¨ã‚’一番ã®ç›®çš„ã¨ã—ã¦ã„ã¾ã™ã€‚ é…延I/Oã¨ã¯ç•°ãªã‚Šã€ãƒªã‚½ãƒ¼ã‚¹ã®å³æ™‚開放をä¿è¨¼ã—〠ã¾ãŸã€ç´”粋ãªã‚³ãƒ¼ãƒ‰ã«ä¾‹å¤–ã‚’æŒã¡è¾¼ã¿ã¾ã›ã‚“。 今回ã®ãƒªãƒªãƒ¼ã‚¹ã§Sourceã€Sinkã€Conduitã®ãã‚Œãžã‚Œã‚’作るãŸã‚ã®ã€ シンプルã§åŠ¹çŽ‡ã®è‰¯ã„ã€é«˜ãƒ¬ãƒ™ãƒ«ã®ã‚¤ãƒ³ã‚¿ãƒ¼ãƒ•
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Iteratee/Enumeratorç³»ã®è©±é¡ŒãŒHaskell界隈ã§é¨’ãŒã‚Œã¦ä¹…ã—ã„ (日本語ã®ç´¹ä»‹è¨˜äº‹)。ã“れらã¯Haskellã§ç´°ç²’度ã®ãƒªã‚½ãƒ¼ã‚¹åˆ¶å¾¡ãŒã§ãるストリーム処ç†ã®æ–¹æ³•ã§ã€ä¾‹å¤–処ç†ã‚‚ã‚„ã‚Šã‚„ã™ã„ã€ã¨ã„ã†è§¦ã‚Œè¾¼ã¿ã ã£ãŸã€‚æ›°ãã€ã‚¹ãƒˆãƒªãƒ¼ãƒ 処ç†ã¯ãƒªã‚½ãƒ¼ã‚¹ã®æ¶ˆè²»é‡ã®ç‚¹ã§ï¼ˆã‚ªãƒ³ãƒ¡ãƒ¢ãƒªã«å…¨ã¦ã‚’ç½®ãよりも）優れã¦ã„ã‚‹ãŒã€hGetContents::IO Handle->Stringã®ã‚ˆã†ãªé…延IOã¯ãƒ•ã‚¡ã‚¤ãƒ«ã®ã‚¯ãƒãƒ¼ã‚ºãªã©ãƒªã‚½ãƒ¼ã‚¹ã®åˆ¶å¾¡ãŒé›£ã—ã„。ãれを改良ã—ãŸã®ãŒIteratee/Enumeratorç³»ã®ãƒ©ã‚¤ãƒ–ラリã ãã†ã 。 Conduit iteratee/enumeratorã®æ”¹è‰¯ã‚’試ã¿ã¦ã„ã‚‹ã®ãŒ Conduit （コンディット？）ã （日本語ã®ç´¹ä»‹è¨˜äº‹ï¼‰ã€‚ 最近ã§ã‚‚ãšã£ã¨æ”¹è‰¯ãŒã¤ã¥ã„ã¦ã„るよã†ã§(å‚考：tanakhã•ã‚“ã®ç™ºè¡¨è³‡æ–™)ã€ä¾‹ãˆã°Source/Conduit/Sinkã®åž‹ãŒPipeã«çµ±
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ANNOUNCE: conduit 1.0, wai 1.4, and more
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