{"id":10557,"date":"2023-11-28T21:38:12","date_gmt":"2023-11-28T13:38:12","guid":{"rendered":"https:\/\/wx.kaifamiao.info\/?p=10557"},"modified":"2023-12-07T14:21:20","modified_gmt":"2023-12-07T06:21:20","slug":"java-zhong-yun-xing-shi-chang-liang-chi-yi-chu-de","status":"publish","type":"post","link":"http:\/\/wx.kaifamiao.info\/index.php\/2023\/11\/28\/java-zhong-yun-xing-shi-chang-liang-chi-yi-chu-de\/","title":{"rendered":"Java\u4e2d\u8fd0\u884c\u65f6\u5e38\u91cf\u6c60\u6ea2\u51fa\u7684\u539f\u56e0\uff1f"},"content":{"rendered":"

\u5728 Java \u4e2d\uff0c\u8fd0\u884c\u65f6\u5e38\u91cf\u6c60\u6ea2\u51fa\u901a\u5e38\u662f\u7531\u4e8e\u521b\u5efa\u8fc7\u591a\u7684\u5e38\u91cf\u6c60\u9879\u800c\u5bfc\u81f4\u7684\u3002\u5e38\u91cf\u6c60\u662f\u4e00\u5757\u7528\u4e8e\u5b58\u50a8\u5b57\u7b26\u4e32\u5e38\u91cf\u548c\u7b26\u53f7\u5f15\u7528\u7684\u5185\u5b58\u533a\u57df\uff0c\u5b83\u5728\u7c7b\u52a0\u8f7d\u7684\u8fc7\u7a0b\u4e2d\u88ab\u521b\u5efa\u3002\u8fd0\u884c\u65f6\u5e38\u91cf\u6c60\u6ea2\u51fa\u53ef\u80fd\u53d1\u751f\u7684\u539f\u56e0\u5305\u62ec\uff1a<\/p>\n

    \n
  1. \n\u5b57\u7b26\u4e32\u62fc\u63a5\u64cd\u4f5c\u7684\u4ea7\u751f\u5927\u91cf\u65b0\u5b57\u7b26\u4e32\uff1a<\/strong> \u5728 Java \u4e2d\uff0c\u5b57\u7b26\u4e32\u62fc\u63a5\u64cd\u4f5c\u4f1a\u4ea7\u751f\u65b0\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u8fd9\u4e9b\u5bf9\u8c61\u4f1a\u88ab\u5b58\u653e\u5728\u8fd0\u884c\u65f6\u5e38\u91cf\u6c60\u4e2d\u3002\u5982\u679c\u5728\u5faa\u73af\u6216\u9012\u5f52\u4e2d\u9891\u7e41\u8fdb\u884c\u5b57\u7b26\u4e32\u62fc\u63a5\uff0c\u5e76\u4e14\u4e0d\u65ad\u4ea7\u751f\u65b0\u7684\u5b57\u7b26\u4e32\u5bf9\u8c61\uff0c\u5c31\u53ef\u80fd\u5bfc\u81f4\u5e38\u91cf\u6c60\u6ea2\u51fa\u3002<\/p>\n
    String str = "";\nfor (int i = 0; i < 100000; i++) {\n    str += "a";\n}\n<\/code><\/pre>\n<\/li>\n
  2. \n\u4f7f\u7528String.intern()<\/code>\u65b9\u6cd5\uff1a<\/strong> String.intern()<\/code>\u65b9\u6cd5\u7528\u4e8e\u5c06\u5b57\u7b26\u4e32\u6dfb\u52a0\u5230\u5e38\u91cf\u6c60\u4e2d\uff0c\u5e76\u8fd4\u56de\u5e38\u91cf\u6c60\u4e2d\u76f8\u7b49\u5b57\u7b26\u4e32\u7684\u5f15\u7528\u3002\u5982\u679c\u5927\u91cf\u5b57\u7b26\u4e32\u88ab\u4f7f\u7528\u5e76\u8c03\u7528\u4e86intern()<\/code>\u65b9\u6cd5\uff0c\u5e38\u91cf\u6c60\u53ef\u80fd\u4f1a\u56e0\u4e3a\u5b58\u50a8\u8fc7\u591a\u5b57\u7b26\u4e32\u800c\u6ea2\u51fa\u3002<\/p>\n
    List<String> strings = new ArrayList<>();\nfor (int i = 0; i < 100000; i++) {\n    strings.add(new String("string" + i).intern());\n}\n<\/code><\/pre>\n<\/li>\n
  3. \n\u5927\u91cf\u7c7b\u7684\u52a8\u6001\u751f\u6210\uff1a<\/strong> \u4e00\u4e9b\u573a\u666f\u4e0b\uff0c\u901a\u8fc7\u52a8\u6001\u751f\u6210\u7c7b\uff0c\u4f8b\u5982\u4f7f\u7528\u5b57\u8282\u7801\u64cd\u4f5c\u5e93\uff08Bytecode Engineering Libraries\uff09\u521b\u5efa\u5927\u91cf\u7c7b\u6587\u4ef6\uff0c\u8fd9\u4e9b\u7c7b\u6587\u4ef6\u4e2d\u5305\u542b\u5e38\u91cf\u6c60\u9879\uff0c\u53ef\u80fd\u5bfc\u81f4\u5e38\u91cf\u6c60\u6ea2\u51fa\u3002<\/p>\n
    for (int i = 0; i < 100000; i++) {\n    \/\/ \u4f7f\u7528\u5b57\u8282\u7801\u64cd\u4f5c\u5e93\u751f\u6210\u7c7b\u6587\u4ef6\uff0c\u5305\u542b\u5e38\u91cf\u6c60\u9879\n}\n<\/code><\/pre>\n<\/li>\n
  4. \n\u8fd0\u884c\u65f6\u52a8\u6001\u751f\u6210\u5927\u91cf\u5b57\u7b26\u4e32\uff1a<\/strong> \u5728\u4e00\u4e9b\u7279\u6b8a\u573a\u666f\u4e0b\uff0c\u901a\u8fc7\u53cd\u5c04\u3001\u52a8\u6001\u4ee3\u7406\u7b49\u65b9\u5f0f\uff0c\u8fd0\u884c\u65f6\u52a8\u6001\u751f\u6210\u5927\u91cf\u5b57\u7b26\u4e32\u5e76\u52a0\u5165\u5e38\u91cf\u6c60\uff0c\u53ef\u80fd\u5bfc\u81f4\u6ea2\u51fa\u3002<\/p>\n
    for (int i = 0; i < 100000; i++) {\n    String str = "string" + i;\n    \/\/ \u4f7f\u7528\u53cd\u5c04\u3001\u52a8\u6001\u4ee3\u7406\u7b49\u65b9\u5f0f\u5c06\u5b57\u7b26\u4e32\u52a0\u5165\u5e38\u91cf\u6c60\n}\n<\/code><\/pre>\n<\/li>\n<\/ol>\n
    \u9632\u6b62\u8fd0\u884c\u65f6\u5e38\u91cf\u6c60\u6ea2\u51fa\u7684\u65b9\u6cd5\u5305\u62ec\u5408\u7406\u8bbe\u8ba1\u4ee3\u7801\u903b\u8f91\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u5b57\u7b26\u4e32\u62fc\u63a5\u548c\u9891\u7e41\u4f7f\u7528intern()<\/code>\u65b9\u6cd5\uff0c\u4ee5\u53ca\u8c28\u614e\u4f7f\u7528\u52a8\u6001\u751f\u6210\u7c7b\u6587\u4ef6\u548c\u5b57\u7b26\u4e32\u7684\u64cd\u4f5c\u3002\u5f53\u9047\u5230\u8fd0\u884c\u65f6\u5e38\u91cf\u6c60\u6ea2\u51fa\u65f6\uff0c\u901a\u5e38\u9700\u8981\u8c03\u6574 JVM \u7684\u53c2\u6570\uff0c\u4f8b\u5982\u901a\u8fc7\u589e\u5927\u5e38\u91cf\u6c60\u5927\u5c0f\u6765\u89e3\u51b3\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
    \u5728 Java \u4e2d\uff0c\u8fd0\u884c\u65f6\u5e38\u91cf\u6c60\u6ea2\u51fa\u901a\u5e38\u662f\u7531\u4e8e\u521b\u5efa\u8fc7\u591a\u7684\u5e38\u91cf\u6c60\u9879\u800c\u5bfc\u81f4\u7684\u3002\u5e38\u91cf\u6c60\u662f\u4e00\u5757\u7528\u4e8e\u5b58\u50a8\u5b57\u7b26\u4e32\u5e38\u91cf\u548c\u7b26\u53f7\u5f15 […]<\/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-10557","post","type-post","status-publish","format-standard","hentry","category-jvm"],"_links":{"self":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10557","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=10557"}],"version-history":[{"count":2,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10557\/revisions"}],"predecessor-version":[{"id":16859,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/posts\/10557\/revisions\/16859"}],"wp:attachment":[{"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/media?parent=10557"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/categories?post=10557"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/wx.kaifamiao.info\/index.php\/wp-json\/wp\/v2\/tags?post=10557"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}