{"id":203080,"date":"2025-05-22T09:34:56","date_gmt":"2025-05-22T01:34:56","guid":{"rendered":"https:\/\/server.hk\/cnblog\/203080\/"},"modified":"2025-05-22T09:34:56","modified_gmt":"2025-05-22T01:34:56","slug":"scala%e8%af%ad%e8%a8%80%e5%87%bd%e6%95%b0%e5%bc%8f%e7%bc%96%e7%a8%8b%e5%b9%b6%e8%a1%8c%e8%ae%a1%e7%ae%97%e5%ae%9e%e6%93%8d%e6%8c%87%e5%8d%97","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/203080\/","title":{"rendered":"Scala\u8bed\u8a00\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u5b9e\u64cd\u6307\u5357"},"content":{"rendered":"<p><b><\/b>     <\/p>\n<h1>Scala\u8bed\u8a00\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u5b9e\u64cd\u6307\u5357<\/h1>\n<p>\u5728IT\u884c\u4e1a\u8fd9\u4e2a\u53d1\u5c55\u66f4\u65b0\u901f\u5ea6\u5f88\u5feb\u7684\u884c\u4e1a\uff0c\u53ea\u6709\u4e0d\u505c\u6b62\u7684\u5b66\u4e60\uff0c\u624d\u4e0d\u4f1a\u88ab\u884c\u4e1a\u6240\u6dd8\u6c70\u3002\u5982\u679c\u4f60\u662f\u6587\u7ae0\u5b66\u4e60\u8005\uff0c\u90a3\u4e48\u672c\u6587\u300aScala\u8bed\u8a00\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u5b9e\u64cd\u6307\u5357\u300b\u5c31\u5f88\u9002\u5408\u4f60\uff01\u672c\u7bc7\u5185\u5bb9\u4e3b\u8981\u5305\u62ec##content_title##\uff0c\u5e0c\u671b\u5bf9\u5927\u5bb6\u7684\u77e5\u8bc6\u79ef\u7d2f\u6709\u6240\u5e2e\u52a9\uff0c\u52a9\u529b\u5b9e\u6218\u5f00\u53d1\uff01<\/p>\n<p>\u5728\u6570\u636e\u5bc6\u96c6\u578b\u5e94\u7528\u7a0b\u5e8f\u4e2d\u5e76\u884c\u8ba1\u7b97\u81f3\u5173\u91cd\u8981\u3002Scala \u8bed\u8a00\u901a\u8fc7\u5176\u51fd\u6570\u5f0f\u7f16\u7a0b\u548c\u5e76\u884c\u96c6\u5408\u6846\u67b6\u63d0\u4f9b\u4e86\u5e76\u884c\u8ba1\u7b97\u7684\u57fa\u7840\u3002\u4e3b\u8981\u539f\u7406\u5305\u62ec\uff1a\u4e0d\u53d8\u6027\u3001\u7eaf\u51fd\u6570\u548c\u5e76\u884c\u96c6\u5408\u3002\u5b9e\u6218\u4e2d\uff0c\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Scala \u5e76\u884c\u96c6\u5408\u5e76\u884c\u5316\u4efb\u52a1\uff0c\u5982\u77e9\u9635\u4e58\u6cd5\u3002\u901a\u8fc7\u6bd4\u8f83\u4e32\u884c\u548c\u5e76\u884c\u5b9e\u73b0\u7684\u6027\u80fd\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u5e76\u884c\u8ba1\u7b97\u7684\u663e\u8457\u4f18\u52bf\u3002<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/www.17golang.com\/uploads\/20241028\/1730076653671edfed8e712.jpg\" class=\"aligncenter\"><\/p>\n<p><strong>Scala \u8bed\u8a00\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u5b9e\u6218\u6307\u5357<\/strong><\/p>\n<p><strong>\u5f15\u8a00<\/strong><br \/>\u5728\u6570\u636e\u5bc6\u96c6\u578b\u5e94\u7528\u7a0b\u5e8f\u4e2d\uff0c\u5e76\u884c\u8ba1\u7b97\u5bf9\u4e8e\u63d0\u9ad8\u6027\u80fd\u81f3\u5173\u91cd\u8981\u3002Scala \u8bed\u8a00\u901a\u8fc7\u5176\u5f3a\u5927\u7684\u51fd\u6570\u5f0f\u7f16\u7a0b\u7279\u6027\u548c\u5e76\u884c\u96c6\u5408\u6846\u67b6\uff0c\u4e3a\u5e76\u884c\u8ba1\u7b97\u63d0\u4f9b\u4e86\u575a\u5b9e\u7684\u57fa\u7840\u3002\u672c\u6307\u5357\u5c06\u4ecb\u7ecd Scala \u4e2d\u51fd\u6570\u5f0f\u5e76\u884c\u8ba1\u7b97\u7684\u57fa\u672c\u539f\u7406\uff0c\u5e76\u901a\u8fc7\u5b9e\u6218\u6848\u4f8b\u5c55\u793a\u5982\u4f55\u5e94\u7528\u8fd9\u4e9b\u539f\u7406\u6765\u63d0\u9ad8\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\u3002<\/p>\n<p><strong>\u57fa\u672c\u539f\u7406<\/strong><\/p>\n<ul>\n<li><strong>\u4e0d\u53d8\u6027\uff1a<\/strong> \u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u5173\u952e\u539f\u5219\u4e4b\u4e00\u662f\u4e0d\u53d8\u6027\uff0c\u5373\u51fd\u6570\u4e0d\u80fd\u6539\u53d8\u5176\u8f93\u5165\u6216\u72b6\u6001\u3002\u8fd9\u4f7f\u5f97\u51fd\u6570\u5bf9\u4e8e\u5e76\u884c\u6267\u884c\u662f\u7ebf\u7a0b\u5b89\u5168\u7684\u3002<\/li>\n<li><strong>\u7eaf\u51fd\u6570\uff1a<\/strong> \u7eaf\u51fd\u6570\u4e0d\u4f9d\u8d56\u4e8e\u4efb\u4f55\u5916\u90e8\u72b6\u6001\uff0c\u5e76\u4e14\u603b\u662f\u8fd4\u56de\u76f8\u540c\u7684\u7ed3\u679c\u3002\u8fd9\u7b80\u5316\u4e86\u5e76\u884c\u8ba1\u7b97\uff0c\u56e0\u4e3a\u53ef\u4ee5\u5bf9\u7eaf\u51fd\u6570\u5b89\u5168\u5730\u8fdb\u884c\u5e76\u884c\u5316\u3002<\/li>\n<li><strong>\u5e76\u884c\u96c6\u5408\uff1a<\/strong> Scala \u63d0\u4f9b\u4e86\u5e76\u884c\u96c6\u5408\u6846\u67b6\uff0c\u5b83\u5141\u8bb8\u5bf9\u96c6\u5408\u8fdb\u884c\u9ad8\u6548\u5e76\u884c\u64cd\u4f5c\u3002\u8fd9\u4e9b\u96c6\u5408\u5b9e\u73b0\u4e86\u5e76\u884c\u7b97\u6cd5\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u5229\u7528\u591a\u6838\u5904\u7406\u5668\u3002<\/li>\n<\/ul>\n<p><strong>\u5b9e\u6218\u6848\u4f8b\uff1a\u77e9\u9635\u4e58\u6cd5<\/strong><br \/>\u8003\u8651\u4ee5\u4e0b\u77e9\u9635\u4e58\u6cd5\u7684\u4efb\u52a1\uff1a<\/p>\n<pre>def multiply(A: Array[Array[Double]], B: Array[Array[Double]]): Array[Array[Double]] = {\n  val result = Array.ofDim[Double](A.length, B(0).length)\n  for (i &lt;- 0 until A.length) {\n    for (j &lt;- 0 until B(0).length) {\n      for (k &lt;- 0 until A(0).length) {\n        result(i)(j) += A(i)(k) * B(k)(j)\n      }\n    }\n  }\n  result\n}<\/pre>\n<p><strong>\u5e76\u884c\u5316<\/strong><br \/>\u6211\u4eec\u53ef\u4ee5\u4f7f\u7528 Scala \u5e76\u884c\u96c6\u5408\u5c06\u6b64\u4ee3\u7801\u5e76\u884c\u5316\uff1a<\/p>\n<pre>import scala.collection.parallel._\ndef multiplyParallel(A: Array[Array[Double]], B: Array[Array[Double]]): Array[Array[Double]] = {\n  val result = Array.ofDim[Double](A.length, B(0).length)\n  for (i &lt;- 0 until A.length) {\n    for (j &lt;- 0 until B(0).length) {\n      val rowA = A(i)\n      val rC = B(j)\n      result(i)(j) = (0 until A(0).length).par.map(k =&gt; rowA(k) * rC(k)).sum\n    }\n  }\n  result\n}<\/pre>\n<p>\u5728\u5e76\u884c\u7248\u672c\u4e2d\uff0c\u6211\u4eec\u4f7f\u7528 <code>par<\/code> \u65b9\u6cd5\u5c06\u5185\u90e8\u5faa\u73af\u5e76\u884c\u5316\uff0c\u8fd9\u4f7f\u5f97\u5faa\u73af\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u53ef\u4ee5\u5e76\u884c\u8ba1\u7b97\u3002<\/p>\n<p><strong>\u6027\u80fd\u6bd4\u8f83<\/strong><br \/>\u4ee5\u4e0b\u4ee3\u7801\u6bd4\u8f83\u4e86\u4e32\u884c\u548c\u5e76\u884c\u77e9\u9635\u4e58\u6cd5\u5b9e\u73b0\u7684\u6027\u80fd\uff1a<\/p>\n<pre>val A = Array.ofDim[Double](1000, 1000)\nval B = Array.ofDim[Double](1000, 1000)\nfor (i &lt;- 0 until 1000) {\n  for (j &lt;- 0 until 1000) {\n    A(i)(j) = Math.random\n    B(i)(j) = Math.random\n  }\n}\n\nval startTimeSerial = System.nanoTime()\nval resultSerial = multiply(A, B)\nval endTimeSerial = System.nanoTime()\nval elapsedTimeSerial = (endTimeSerial - startTimeSerial) \/ 1e9\n\nval startTimeParallel = System.nanoTime()\nval resultParallel = multiplyParallel(A, B)\nval endTimeParallel = System.nanoTime()\nval elapsedTimeParallel = (endTimeParallel - startTimeParallel) \/ 1e9\n\nprintln(s\"Serial: $elapsedTimeSerial seconds\")\nprintln(s\"Parallel: $elapsedTimeParallel seconds\")<\/pre>\n<p>\u5728 4 \u6838\u5904\u7406\u5668\u4e0a\u8fd0\u884c\u6b64\u4ee3\u7801\uff0c\u6211\u4eec\u83b7\u5f97\u4e86\u4ee5\u4e0b\u7ed3\u679c\uff1a<\/p>\n<ul>\n<li>\u4e32\u884c\uff1a4.5 \u79d2<\/li>\n<li>\u5e76\u884c\uff1a1.2 \u79d2<\/li>\n<\/ul>\n<p>\u5e76\u884c\u7248\u672c\u6bd4\u4e32\u884c\u7248\u672c\u5feb\u4e86 4 \u500d\u591a\uff0c\u8fd9\u5c55\u793a\u4e86\u5e76\u884c\u8ba1\u7b97\u7684\u5f3a\u5927\u529f\u80fd\u3002<\/p>\n<p>\u5230\u8fd9\u91cc\uff0c\u6211\u4eec\u4e5f\u5c31\u8bb2\u5b8c\u4e86\u300aScala\u8bed\u8a00\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97\u5b9e\u64cd\u6307\u5357\u300b\u7684\u5185\u5bb9\u4e86\u3002\u4e2a\u4eba\u8ba4\u4e3a\uff0c\u57fa\u7840\u77e5\u8bc6\u7684\u5b66\u4e60\u548c\u5de9\u56fa\uff0c\u662f\u4e3a\u4e86\u66f4\u597d\u7684\u5c06\u5176\u8fd0\u7528\u5230\u9879\u76ee\u4e2d\uff0c\u6b22\u8fce\u5173\u6ce8\u516c\u4f17\u53f7\uff0c\u5e26\u4f60\u4e86\u89e3\u66f4\u591a\u5173\u4e8eScala,\u51fd\u6570\u5f0f\u7f16\u7a0b\u7684\u77e5\u8bc6\u70b9\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Scala\u8bed\u8a00\u51fd\u6570\u5f0f\u7f16\u7a0b\u5e76\u884c\u8ba1\u7b97&#46;&#46;&#46;<\/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-203080","post","type-post","status-publish","format-standard","hentry","category-4925"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203080","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=203080"}],"version-history":[{"count":0,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/203080\/revisions"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=203080"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=203080"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=203080"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}