{"id":361776,"date":"2021-02-21T04:03:51","date_gmt":"2021-02-20T20:03:51","guid":{"rendered":"http:\/\/4563.org\/?p=361776"},"modified":"2021-02-21T04:03:51","modified_gmt":"2021-02-20T20:03:51","slug":"settimeout-console-loghello-1000%ef%bc%8c%e8%bf%99%e5%8f%a5%e4%bb%a3%e7%a0%81%e9%87%8c%e9%9d%a2%ef%bc%8c%e6%98%af%e4%bb%80%e4%b9%88%e7%ba%bf%e7%a8%8b%e5%9c%a8-1000-%e6%af%ab%e7%a7%92","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=361776","title":{"rendered":"setTimeout(() => {console.log(‘Hello’)}, 1000)\uff0c\u8fd9\u53e5\u4ee3\u7801\u91cc\u9762\uff0c\u662f\u4ec0\u4e48\u7ebf\u7a0b\u5728 1000 \u6beb\u79d2\u4e4b\u540e\u628a\u6267\u884c\u4ee3\u7801\u63a8\u5165 js \u7684\u4efb\u52a1\u961f\u5217\u4e2d\u7684\uff1f"},"content":{"rendered":"
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setTimeout(() => {console.log(‘Hello’)}, 1000)\uff0c\u8fd9\u53e5\u4ee3\u7801\u91cc\u9762\uff0c\u662f\u4ec0\u4e48\u7ebf\u7a0b\u5728 1000 \u6beb\u79d2\u4e4b\u540e\u628a\u6267\u884c\u4ee3\u7801\u63a8\u5165 js \u7684\u4efb\u52a1\u961f\u5217\u4e2d\u7684\uff1f <\/h1>\n

<\/p>\n

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\u8cc7\u6df1\u5927\u4f6c : jadeborner <\/span> <\/i> 6<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u662f\u6e32\u67d3\u8fdb\u7a0b\u4e2d\u7684\u8ba1\u65f6\u5668\u89e6\u53d1\u7ebf\u7a0b? \u5982\u679c\u540c\u65f6\u6709\u5927\u91cf\u7684 setTimeout\uff0c\u662f\u5982\u4f55\u5904\u7406\u7684\uff1f \u6bd4\u5982 for(let i = 0; i < 10000; i++) { setTimeout(() => {}, 1000) }<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (8<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : togou <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5148\u63a8\u5230\u961f\u5217 \u7136\u540e\u8dd1\u522b\u7684\u4efb\u52a1 \u7136\u540e\u518d\u68c0\u67e5 <\/div>\n<\/p><\/div>\n<\/li>\n
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    \u8cc7\u6df1\u5927\u4f6c : Chenamy2017 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u5148\u5faa\u73af\u63a8\u5165\u961f\u5217 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : zivyou <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    ———————————— event loop one tick
    1. ——> process.nextTick();
    2. ——> Timer \/\/ setTimeout, setInterval
    3. ——> idle, prepare \/\/ node.js \u5185\u90e8\u4f7f\u7528
    4. ——> poll \/\/ select\uff0cepoll \u7b49\u7cfb\u7edf\u8c03\u7528\u7684\u68c0\u67e5
    5. ——> check \/\/ setImmediate
    6. ——> close.callback \/\/ \u4e00\u4e9b\u8d44\u6e90\u7684\u5173\u95ed\u8c03\u7528\u56de\u8c03<\/p>\n

    \u8fd9\u4e2a\u8fc7\u7a0b\u662f\u4e8b\u4ef6\u5faa\u73af\u7684\u4e00\u4e2a tick.
    node.js \u662f\u4e00\u4e2a\u7c7b\u4f3c\u4e8e\u4e00\u4e2a\u65f6\u949f\u5468\u671f\u4e00\u4e2a\u65f6\u949f\u5468\u671f\u53bb\u6267\u884c\u7684\uff0c\u5728\u6bcf\u4e2a\u65f6\u949f\u5468\u671f\u5185\u53bb\u505a\u4e0a\u8ff0\u6b65\u9aa4\u4e2d\u7684\u5de5\u4f5c\u5185\u5bb9\u3002
    \u5982\u679c\u6709\u5f88\u591a\u4e2a setTimeout\uff0c\u90a3\u5728\u4e0a\u9762\u7684\u7b2c 2 \u6b65\u90a3\u91cc\uff0c\u4f1a\u5c06\u8981\u6267\u884c\u7684\u4efb\u52a1\u90fd\u653e\u5230\u4e00\u4e2a\u961f\u5217\u4e2d\u3002\u6bcf\u4e2a tick \u6765\u7684\u65f6\u5019\uff0c\u770b\u4e00\u4e0b\u8fd9\u4e9b\u4efb\u52a1\u5230\u6ca1\u5230\u8981\u6267\u884c\u7684\u70b9\uff0c\u5982\u679c\u5230\u4e86\uff0c\u5c31\u6267\u884c\u4e00\u4e0b\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n

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    \u8cc7\u6df1\u5927\u4f6c : pkookp8 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    http:\/\/www.ruanyifeng.com\/blog\/2018\/02\/node-event-loop.html?from=timeline&isappinstalled=0
    \u6211\u89c9\u5f97\u8bb2\u7684\u633a\u597d\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : yyfearth <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @jadeborner node \u548c chrome browser js \u4e00\u6837\u7684 v8 \u5f15\u64ce\u554a <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
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    \u8cc7\u6df1\u5927\u4f6c : yyfearth <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    API \u4e0d\u4e00\u6837 \u4f46\u662f\u539f\u7406\u662f\u4e00\u6837\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
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    \u8cc7\u6df1\u5927\u4f6c : otakustay <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    timeout \u7684\u4efb\u52a1\u4e00\u76f4\u5728\u961f\u5217\u4e2d\uff0c\u6ca1\u6709\u201c\u5ef6\u8fdf\u63a8\u5165\u201d\u7684\u8bf4\u6cd5\u3002\u8fd9\u4e2a\u4efb\u52a1\u4e0a\u6709\u4e00\u4e2a\u6807\u8bc6\uff08 XX \u65f6\u5019\u5f00\u59cb\uff0c1000ms \u540e\u8981\u6267\u884c\uff09\uff0cJS \u5f15\u64ce\u6709\u7a7a\u7684\u65f6\u5019\u5c31\u4f1a\u7ffb\u5230\u8fd9\u4e2a\u4efb\u52a1\uff0c\u770b\u770b\u65f6\u95f4\u5230\u4e86\u6ca1\u6709\uff0c\u65f6\u95f4\u6ca1\u5230\u5c31\u628a\u5b83\u518d\u4e22\u56de\u961f\u5217\u91cc\u53bb\u6392\u7740 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
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    \u8cc7\u6df1\u5927\u4f6c : cxe2v <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u6d4f\u89c8\u5668\u5173\u4e8e JS \u8fd9\u5757\u4e00\u5171\u6709 5 \u4e2a\u7ebf\u7a0b\uff0c<\/p>\n

    GUI
    JS \u5f15\u64ce
    \u5b9a\u65f6\u5668
    \u4e8b\u4ef6\u89e6\u53d1
    \u5f02\u6b65\u8bf7\u6c42<\/p>\n

    setTimeout \u548c setInterval \u662f\u5c5e\u4e8e\u5b9a\u65f6\u5668\u7ebf\u7a0b\u5c06\u5bf9\u5e94\u7684\u4efb\u52a1\u63a8\u5165\u4efb\u52a1\u961f\u5217 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n","protected":false},"excerpt":{"rendered":"

    setTimeout(() =&g…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/361776"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=361776"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/361776\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=361776"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=361776"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=361776"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}