{"id":207737,"date":"2025-07-08T10:48:02","date_gmt":"2025-07-08T02:48:02","guid":{"rendered":"https:\/\/server.hk\/cnblog\/207737\/"},"modified":"2025-07-08T10:48:02","modified_gmt":"2025-07-08T02:48:02","slug":"%e5%86%85%e5%ad%98%e6%9c%aa%e9%87%8a%e6%94%be%e5%9b%9e%e6%93%8d%e4%bd%9c%e7%b3%bb%e7%bb%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/207737\/","title":{"rendered":"\u5185\u5b58\u672a\u91ca\u653e\u56de\u64cd\u4f5c\u7cfb\u7edf"},"content":{"rendered":"

<\/b> <\/p>\n

\u5f53\u524d\u4f4d\u7f6e\uff1a ><\/span> ><\/span> ><\/span> ><\/span> \u5185\u5b58\u672a\u91ca\u653e\u56de\u64cd\u4f5c\u7cfb\u7edf<\/span><\/p>\n

\u6765\u6e90\uff1astackoverflow<\/span>
\n2024-04-25 10:30:33<\/span>
\n<\/i>0\u6d4f\u89c8<\/span>
\n<\/i>\u6536\u85cf<\/span> <\/p>\n

\u5728Golang\u5b9e\u6218\u5f00\u53d1\u7684\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u7ecf\u5e38\u4f1a\u9047\u5230\u4e00\u4e9b\u8fd9\u6837\u90a3\u6837\u7684\u95ee\u9898\uff0c\u7136\u540e\u8981\u5361\u597d\u534a\u5929\uff0c\u7b49\u95ee\u9898\u89e3\u51b3\u4e86\u624d\u53d1\u73b0\u539f\u6765\u4e00\u4e9b\u7ec6\u8282\u77e5\u8bc6\u70b9\u8fd8\u662f\u6ca1\u6709\u638c\u63e1\u597d\u3002\u4eca\u5929\u5c31\u6574\u7406\u5206\u4eab\u300a\u5185\u5b58\u672a\u91ca\u653e\u56de\u64cd\u4f5c\u7cfb\u7edf\u300b\uff0c\u804a\u804a\uff0c\u5e0c\u671b\u53ef\u4ee5\u5e2e\u52a9\u5230\u6b63\u5728\u52aa\u529b\u8d5a\u94b1\u7684\u4f60\u3002<\/p>\n

\u95ee\u9898\u5185\u5bb9
\n <\/p>\n

\u6211\u521b\u5efa\u4e86\u4e00\u4e2a\u56fe\u50cf\u8c03\u6574\u5927\u5c0f\u670d\u52a1\u5668\uff0c\u5b83\u53ef\u4ee5\u4e3a\u60a8\u4e0a\u4f20\u5230\u5176\u4e2d\u7684\u56fe\u50cf\u521b\u5efa\u4e00\u4e9b\u4e0d\u540c\u7684\u7f29\u7565\u56fe\u3002\u6211\u4f7f\u7528 https:\/\/github.com\/h2non\/bimg \u5305\u6765\u8c03\u6574\u5927\u5c0f\uff0c\u8be5\u5305\u4f7f\u7528\u5e26\u6709 c \u7ed1\u5b9a\u7684 libvips\u3002<\/p>\n

\u5728\u6295\u5165\u751f\u4ea7\u4e4b\u524d\uff0c\u6211\u5f00\u59cb\u4f7f\u7528 jmeter \u5bf9\u6211\u7684\u5e94\u7528\u7a0b\u5e8f\u8fdb\u884c\u538b\u529b\u6d4b\u8bd5\uff0c\u5e76\u540c\u65f6\u5411\u5176\u4e0a\u4f20 100 \u4e2a\u56fe\u50cf\uff0c\u5e76\u5148\u540e\u591a\u6b21\u4e0a\u4f20\uff0c\u5e76\u6ce8\u610f\u5230\u5185\u5b58\u6ca1\u6709\u88ab\u91ca\u653e\u56de\u64cd\u4f5c\u7cfb\u7edf\u3002<\/p>\n

\u4e3a\u4e86\u8bf4\u660e\u8fd9\u4e2a\u95ee\u9898\uff0c\u6211\u7f16\u5199\u4e86\u51e0\u884c\u4ee3\u7801\u6765\u8bfb\u53d6 100 \u4e2a\u56fe\u50cf\u5e76\u8c03\u6574\u5b83\u4eec\u7684\u5927\u5c0f\uff08\u4e0d\u5c06\u5b83\u4eec\u4fdd\u5b58\u5728\u4efb\u4f55\u5730\u65b9\uff09\uff0c\u7136\u540e\u7b49\u5f85 10 \u5206\u949f\u3002\u5982\u6b64\u91cd\u590d5\u6b21<\/p>\n

\u6211\u7684\u4ee3\u7801\u548c\u5185\u5b58\/CPU \u56fe\u8868\u53ef\u4ee5\u5728\u8fd9\u91cc\u627e\u5230\uff1a https:\/\/github.com\/hamochi\/bimg-memory-issue<\/p>\n

\u5f88\u660e\u663e\uff0c\u5185\u5b58\u5728\u6bcf\u4e2a\u5468\u671f\u90fd\u88ab\u91cd\u7528\uff0c\u5426\u5219\u5b83\u5e94\u8be5\u589e\u52a0\u4e00\u500d\uff08\u6211\u8ba4\u4e3a\uff09\u3002\u4f46\u5b83\u6c38\u8fdc\u4e0d\u4f1a\u91ca\u653e\u56de\u64cd\u4f5c\u7cfb\u7edf\u3002<\/p>\n

\u8fd9\u662f cgo \u7684\u666e\u904d\u884c\u4e3a\u5417\uff1f\u6216\u8005 bimg \u6b63\u5728\u505a\u4e00\u4e9b\u5947\u602a\u7684\u4e8b\u60c5\u3002\u6216\u8005\u53ea\u662f\u6211\u7684\u4ee3\u7801\u6709\u95ee\u9898\uff1f<\/p>\n

\u975e\u5e38\u611f\u8c22\u60a8\u63d0\u4f9b\u7684\u4efb\u4f55\u5e2e\u52a9\uff01<\/p>\n

<\/p>\n

\u89e3\u51b3\u65b9\u6848<\/h2>\n

<\/p>\n

\u6709\u4e00\u4e2a libvips \u53ef\u4ee5\u8ddf\u8e2a\u548c\u8c03\u8bd5\u5f15\u7528\u8ba1\u6570\u2014\u2014\u4f60\u53ef\u4ee5\u5c1d\u8bd5\u542f\u7528\u5b83\uff0c\u770b\u770b\u662f\u5426\u6709\u4efb\u4f55\u6cc4\u6f0f\u3002<\/p>\n<\/p>\n

\u867d\u7136\u4ece\u60a8\u4e0a\u9762\u5173\u4e8e bimg \u5185\u5b58\u7edf\u8ba1\u6570\u636e\u7684\u8bc4\u8bba\u6765\u770b\uff0c\u542c\u8d77\u6765\u53ef\u80fd\u4e00\u5207\u90fd\u5f88\u597d\u3002<\/p>\n

\u4ece python \u6d4b\u8bd5 libvips \u5185\u5b58\u5f88\u5bb9\u6613\u3002\u6211\u505a\u4e86\u8fd9\u4e2a\u5c0f\u7a0b\u5e8f\uff1a<\/p>\n

#!\/usr\/bin\/python3\n\nimport pyvips\nimport sys\n\n# disable libvips operation caching ... without this, it'll cache all the\n# thumbnail operations and we'll just be testing the jpg write\npyvips.cache_set_max(0)\n\nfor i in range(0, 10000):\n    print(\"loop {} ...\".format(i))\n    for filename in sys.argv[1:]:\n        # thumbnail to fit 128x128 box\n        image = pyvips.image.thumbnail(filename, 128)\n        thumb = image.write_to_buffer(\".jpg\")<\/pre>\n
\u5373\u3002\u91cd\u590d\u7f29\u7565\u56fe\u4e00\u7ec4\u6e90\u56fe\u50cf\u3002\u6211\u662f\u8fd9\u6837\u8fd0\u884c\u7684\uff1a<\/p>\n
$ for i in {1..100}; do cp ~\/pics\/k2.jpg $i.jpg; done\n$ ..\/fing.py *<\/pre>\n
\u5e76\u89c2\u770b\u4e86\u9876\u90e8\u7684 res\u3002\u6211\u770b\u5230\uff1a<\/p>\n
loop | RES (kb)\n  -- | --\n 100 | 39220\n 250 | 39324\n 300 | 39276\n 400 | 39316\n 500 | 39396\n 600 | 39464\n 700 | 39404\n1000 | 39420<\/pre>\n
\u53ea\u8981\u60a8\u6ca1\u6709\u5f15\u7528\u8ba1\u6570\u6cc4\u6f0f\uff0c\u6211\u8ba4\u4e3a\u60a8\u6240\u770b\u5230\u7684\u5c31\u662f\u9884\u671f\u7684\u884c\u4e3a\u3002 linux \u8fdb\u7a0b\u53ea\u80fd\u5c06\u5806\u672b\u5c3e\u7684\u9875\u9762\u91ca\u653e\u56de\u64cd\u4f5c\u7cfb\u7edf\uff08\u770b\u770b brk \u548c sbrk sys \u8c03\u7528\uff09\uff1a<\/p>\n<\/p>\n
\u73b0\u5728\u60f3\u8c61\u4e00\u4e0b\uff0c\u5982\u679c 1) libvips \u5206\u914d 6gb\uff0c2) go \u8fd0\u884c\u65f6\u5206\u914d 100kb\uff0c3) libvips \u91ca\u653e 6gb\u3002\u4f60\u7684 libc\uff08\u8fdb\u7a0b\u4e2d\u4ee3\u8868\u4f60\u8c03\u7528 sbrk \u548c brk \u7684\u4e1c\u897f\uff09\u65e0\u6cd5\u5c06 6gb \u8fd4\u56de\u7ed9\u64cd\u4f5c\u7cfb\u7edf\uff0c\u56e0\u4e3a\u5806\u672b\u5c3e\u6709 100kb \u5206\u914d\u3002\u67d0\u4e9b malloc \u5b9e\u73b0\u6bd4\u5176\u4ed6\u5b9e\u73b0\u5177\u6709\u66f4\u597d\u7684\u5185\u5b58\u788e\u7247\u884c\u4e3a\uff0c\u4f46\u9ed8\u8ba4\u7684 linux \u5b9e\u73b0\u76f8\u5f53\u4e0d\u9519\u3002<\/p>\n
\u5b9e\u9645\u4e0a\uff0c\u8fd9\u5e76\u4e0d\u91cd\u8981\u3002 malloc \u4f1a\u91cd\u7528\u5185\u5b58\u7a7a\u95f4\u4e2d\u7684\u6f0f\u6d1e\uff0c\u5373\u4f7f\u4e0d\u8fd9\u6837\u505a\uff0c\u5b83\u4eec\u4e5f\u4f1a\u5728\u5185\u5b58\u538b\u529b\u4e0b\u88ab\u8c03\u51fa\u9875\u9762\uff0c\u5e76\u4e14\u6700\u7ec8\u4e0d\u4f1a\u5360\u7528 ram\u3002\u5c1d\u8bd5\u8fd0\u884c\u60a8\u7684\u8fdb\u7a0b\u51e0\u4e2a\u5c0f\u65f6\uff0c\u7136\u540e\u89c2\u770b res\u3002\u60a8\u5e94\u8be5\u770b\u5230\u5b83\u7f13\u6162\u4e0a\u5347\uff0c\u4f46\u968f\u540e\u7a33\u5b9a\u4e0b\u6765\u3002<\/p>\n
\uff08\u6211\u6839\u672c\u4e0d\u662f\u6838\u5fc3\u4eba\uff0c\u4ee5\u4e0a\u53ea\u662f\u6211\u7684\u7406\u89e3\uff0c\u5f53\u7136\u975e\u5e38\u6b22\u8fce\u6307\u6b63\uff09<\/p>\n
\u4eca\u5929\u5173\u4e8e\u300a\u5185\u5b58\u672a\u91ca\u653e\u56de\u64cd\u4f5c\u7cfb\u7edf\u300b\u7684\u5185\u5bb9\u4ecb\u7ecd\u5c31\u5230\u6b64\u7ed3\u675f\uff0c\u5982\u679c\u6709\u4ec0\u4e48\u7591\u95ee\u6216\u8005\u5efa\u8bae\uff0c\u53ef\u4ee5\u5728\u516c\u4f17\u53f7\u4e0b\u591a\u591a\u56de\u590d\u4ea4\u6d41\uff1b\u6587\u4e2d\u82e5\u6709\u4e0d\u6b63\u4e4b\u5904\uff0c\u4e5f\u5e0c\u671b\u56de\u590d\u7559\u8a00\u4ee5\u544a\u77e5\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u5f53\u524d\u4f4d\u7f6e\uff1a > > ...<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4925],"tags":[],"class_list":["post-207737","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207737","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=207737"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/207737\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=207737"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=207737"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=207737"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}