{"id":10573,"date":"2023-11-28T21:38:40","date_gmt":"2023-11-28T13:38:40","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10573"},"modified":"2023-12-07T14:27:31","modified_gmt":"2023-12-07T06:27:31","slug":"jvm-zhong-shen-me-shi-tao-yi-fen-xi","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/jvm-zhong-shen-me-shi-tao-yi-fen-xi\/","title":{"rendered":"JVM\u4e2d\u4ec0\u4e48\u662f\u9003\u9038\u5206\u6790\uff1f"},"content":{"rendered":"<p>\u9003\u9038\u5206\u6790\u662fJava\u865a\u62df\u673a\u5728\u8fd0\u884c\u65f6\u5206\u6790\u7a0b\u5e8f\u4e2d\u5bf9\u8c61\u7684\u52a8\u6001\u4f5c\u7528\u57df\u7684\u8fc7\u7a0b\u3002\u8be5\u5206\u6790\u4e3b\u8981\u7528\u4e8e\u786e\u5b9a\u5bf9\u8c61\u7684\u5f15\u7528\u662f\u5426\u4f1a\u9003\u9038\u51fa\u65b9\u6cd5\u7684\u4f5c\u7528\u57df\u3002\u5982\u679c\u5bf9\u8c61\u4e0d\u4f1a\u9003\u9038\u51fa\u65b9\u6cd5\uff0c\u90a3\u4e48\u53ef\u80fd\u8fdb\u884c\u4e00\u4e9b\u4f18\u5316\uff0c\u5982\u6808\u4e0a\u5206\u914d\u6216\u6807\u91cf\u66ff\u6362\uff0c\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6027\u80fd\u3002<\/p>\n<p>\u5177\u4f53\u6765\u8bf4\uff0c\u9003\u9038\u5206\u6790\u6709\u4e24\u4e2a\u4e3b\u8981\u65b9\u9762\uff1a<\/p>\n<ol>\n<li>\n<strong>\u6808\u4e0a\u5206\u914d\uff08Stack Allocation\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u5f53\u5206\u6790\u53d1\u73b0\u4e00\u4e2a\u5bf9\u8c61\u7684\u5f15\u7528\u4e0d\u4f1a\u9003\u9038\u51fa\u65b9\u6cd5\uff0c\u5373\u5bf9\u8c61\u7684\u4f5c\u7528\u57df\u9650\u5b9a\u5728\u5f53\u524d\u65b9\u6cd5\u5185\u90e8\uff0c\u53ef\u4ee5\u8003\u8651\u5c06\u5bf9\u8c61\u5206\u914d\u5230\u7ebf\u7a0b\u6808\u4e0a\u800c\u4e0d\u662f\u5806\u4e0a\u3002\u8fd9\u6837\u505a\u53ef\u4ee5\u51cf\u8f7b\u5783\u573e\u56de\u6536\u7684\u538b\u529b\uff0c\u56e0\u4e3a\u5bf9\u8c61\u5728\u65b9\u6cd5\u7ed3\u675f\u65f6\u4f1a\u81ea\u52a8\u88ab\u9500\u6bc1\uff0c\u65e0\u9700\u8fdb\u884c\u989d\u5916\u7684\u5783\u573e\u56de\u6536\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<\/li>\n<li>\n<strong>\u6807\u91cf\u66ff\u6362\uff08Scalar Replacement\uff09\uff1a<\/strong><\/p>\n<ul>\n<li>\u5f53\u9003\u9038\u5206\u6790\u53d1\u73b0\u5bf9\u8c61\u7684\u5f15\u7528\u4e0d\u4f1a\u9003\u9038\u51fa\u65b9\u6cd5\uff0c\u5e76\u4e14\u5bf9\u8c61\u7684\u6210\u5458\u53d8\u91cf\u4e5f\u6ca1\u6709\u9003\u9038\u51fa\u65b9\u6cd5\uff0c\u90a3\u4e48\u53ef\u4ee5\u5c06\u5bf9\u8c61\u62c6\u6563\u4e3a\u5176\u6210\u5458\u53d8\u91cf\uff0c\u5206\u522b\u8fdb\u884c\u6807\u91cf\u66ff\u6362\u3002\u8fd9\u610f\u5473\u7740\u5c06\u5bf9\u8c61\u7684\u5404\u4e2a\u6210\u5458\u53d8\u91cf\u5206\u522b\u5b58\u50a8\u5728\u6808\u4e0a\u6216\u5bc4\u5b58\u5668\u4e2d\uff0c\u800c\u4e0d\u662f\u4f5c\u4e3a\u4e00\u4e2a\u6574\u4f53\u5b58\u50a8\u5728\u5806\u4e0a\u3002\u8fd9\u6837\u53ef\u4ee5\u63d0\u9ad8\u7a0b\u5e8f\u7684\u8fd0\u884c\u6548\u7387\uff0c\u51cf\u5c11\u5bf9\u5806\u5185\u5b58\u7684\u8bbf\u95ee\u3002<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n<p>\u9003\u9038\u5206\u6790\u7684\u4e3b\u8981\u76ee\u6807\u662f\u4f18\u5316\u5bf9\u8c61\u7684\u5206\u914d\u548c\u4f7f\u7528\uff0c\u4ece\u800c\u63d0\u9ad8\u7a0b\u5e8f\u7684\u6027\u80fd\u3002\u8fd9\u4e9b\u4f18\u5316\u901a\u5e38\u7531JVM\u6267\u884c\uff0c\u800c\u5f00\u53d1\u4eba\u5458\u65e0\u9700\u624b\u52a8\u5e72\u9884\u3002\u7136\u800c\uff0c\u4e00\u4e9bJVM\u53c2\u6570\u53ef\u4ee5\u7528\u4e8e\u63a7\u5236\u9003\u9038\u5206\u6790\u7684\u884c\u4e3a\uff0c\u5982<code>-XX:+DoEscapeAnalysis<\/code>\u548c<code>-XX:+EliminateAllocations<\/code>\u7b49\u3002\u5728\u4e00\u4e9b\u7279\u5b9a\u573a\u666f\u4e0b\uff0c\u624b\u52a8\u8c03\u6574\u8fd9\u4e9b\u53c2\u6570\u53ef\u80fd\u6709\u52a9\u4e8e\u8fdb\u4e00\u6b65\u4f18\u5316\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9003\u9038\u5206\u6790\u662fJava\u865a\u62df\u673a\u5728\u8fd0\u884c\u65f6\u5206\u6790\u7a0b\u5e8f\u4e2d\u5bf9\u8c61\u7684\u52a8\u6001\u4f5c\u7528\u57df\u7684\u8fc7\u7a0b\u3002\u8be5\u5206\u6790\u4e3b\u8981\u7528\u4e8e\u786e\u5b9a\u5bf9\u8c61\u7684\u5f15\u7528\u662f\u5426\u4f1a\u9003\u9038\u51fa\u65b9\u6cd5 [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[119],"tags":[],"class_list":["post-10573","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10573","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/comments?post=10573"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10573\/revisions"}],"predecessor-version":[{"id":16862,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10573\/revisions\/16862"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10573"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10573"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10573"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}