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</description><language>zh-cn</language><lastBuildDate>Thu, 23 Apr 2015 12:05:50 GMT</lastBuildDate><pubDate>Thu, 23 Apr 2015 12:05:50 GMT</pubDate><ttl>60</ttl><item><title>鍨冨溇鏀墮泦--浠庣畻娉曡搴﹀幓鐪?/title><link>http://www.shnenglu.com/Chipset/archive/2015/04/20/210402.html</link><dc:creator>Chipset</dc:creator><author>Chipset</author><pubDate>Mon, 20 Apr 2015 09:21:00 GMT</pubDate><guid>http://www.shnenglu.com/Chipset/archive/2015/04/20/210402.html</guid><wfw:comment>http://www.shnenglu.com/Chipset/comments/210402.html</wfw:comment><comments>http://www.shnenglu.com/Chipset/archive/2015/04/20/210402.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/Chipset/comments/commentRss/210402.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/Chipset/services/trackbacks/210402.html</trackback:ping><description><![CDATA[<div>鍏跺疄鍨冨溇鏀墮泦灝辨槸瀵逛簬鏃犵敤鐨?涔熺О浣滄浜＄殑)瀵硅薄閲婃斁鎺変粬浠崰鐢ㄧ殑璧勬簮銆傛棤璁篔ava榪樻槸C#榪樻槸鑴氭湰璇█錛岃繕鏄叾浠栵紝鍨冨溇鏀墮泦鏃犻潪灝變笁鍥涗釜綆楁硶錛屼笅闈㈠垎鍒粙緇嶃�?p style="background-color:transparent;"><strong>1. 寮曠敤璁℃暟</strong><br style="background-color:transparent;" /></p><p style="background-color:transparent;">涓� 涓璞?鏈枃閲屽璞￠兘鏄箍涔夌殑瀵硅薄錛屼笉鏄笓鎸囩敤class綾誨瀷鍒涘緩鐨勫彉閲忥紝涓嬪悓)鍒氬垱寤烘椂錛岃鏁板櫒(鐢ㄤ竴涓暣鏁板彉閲?涓?錛屽紩鐢ㄤ竴嬈¤鏁板櫒鍔?錛岃繃鏈熷噺 1錛屽彸鍊煎紩鐢╗璇峰弬鑰僀++11鏍囧噯閲岀殑鍙沖�煎紩鐢ㄦ蹇碉紝濡傛灉浣犱笉鏄庣櫧鐨勮瘽]涓�嬈″噺1錛屽綋璁℃暟鍣ㄩ檷鍒?鏃惰瀵硅薄榪囨湡錛屽洖鏀舵帀浠栧崰鐢ㄧ殑璧勬簮銆?/p><p style="background-color:transparent;">鍘熺悊鍗佸垎綆�鍗曪紝瀹炵幇璧鋒潵涔熷鏄擄紝灝ゅ叾瀵逛簬澶у璞★紝綆�鐩存槸緇濋厤錛岃鏁板櫒鏄叡浜彉閲忥紝閫氬父鐢ㄤ竴涓暣鍨嬪彉閲忚〃紺猴紝瀹冪殑鍔犲噺鐢ㄥ師瀛愭搷浣滃氨鑳芥悶瀹氾紝閫熷害寰堝揩銆傚啀鑰呭氨鏄疄鏃舵�у緢濂斤紝寮曠敤灝卞姞1錛屼笉寮曠敤灝卞噺1錛岃繃鏈熷氨娑堝け銆?/p><p style="background-color:transparent;">瀵?浜庡皬瀵硅薄鏉ヨ灝變笉鐖戒簡(jiǎn)錛屾瘮濡備竴涓瓧絎︼紝鍗犵敤鐨勫唴瀛樻瘮璁℃暟鍣ㄨ繕灝忥紝瀵逛簬瀵硅薄閮戒粠鍫嗕笂鍒涘緩鐨勮璦�錛屼緥濡侸ava錛屼笉澶悎閫傘�傚彟澶栦竴涓己鐐規(guī)槸寰幆寮曠敤姣旇緝楹葷儲(chǔ)錛?姝ゆ椂璁℃暟鍣ㄦ案榪滀笉浼?xì)闄嶅?錛屾鏃朵細(xì)瀵艱嚧鍐呭瓨娉勬紡銆傛棭鏈熺殑COM婕忓唴瀛樺氨鏄洜涓鴻繖涓師鍥狅紝Perl閲岃嚦浠婂璞￠兘涓嶈兘寰幆寮曠敤錛屽惁鍒欐紡鍐呭瓨銆傝В鍐蟲柟妗堜篃鏈夛紝璇?鍙傝�僀++11閲岀殑weak_ptr鍜宐oost閲岀殑weak_ptr瀹炵幇銆?/p><p style="background-color:transparent;"><strong>2. 鏍囪娓呯悊</strong></p><p style="background-color:transparent;">鐪嬪悕瀛楀氨鑳芥槑鐧斤紝灝卞儚鎵撴爣絳俱�傚畾鏈熺殑鎵弿鍫嗕笂鐨勫璞★紝鎶婁竴涓璞″垎鎴愪笁涓樁孌?浠庢暟瀛﹁搴︽潵鐪嬫槸涓変釜闆嗗悎) 榛?鐏?鐧藉鐞嗭紝榛戣〃紺哄崰鐢ㄧ姸鎬侊紝鐧借〃紺烘棤鐢ㄧ姸鎬侊紝鐏頒綅浜庝簩鑰呬箣闂達(dá)紝鐧借〃紺哄彲浠ュ洖鏀朵簡(jiǎn)銆傚疄闄呭疄鐜頒腑鍙兘騫朵笉涓ユ牸鎸夌収鐞嗚涓婅繖鏍峰尯鍒嗗摝銆?/p><p style="background-color:transparent;">涓嶅仠鐨勬壂鎻忎細(xì)鑰楄垂澶鐨勮祫婧愶紝闀挎椂闂翠笉鎵弿鍒欏彲鑳藉爢鍐呭瓨鑰楀敖錛岃繖涓壂鎻忔椂鏈烘槸涓棶棰樸�傛壂鎻忓疄闄呮湁鐨勮璁℃垚浠誨姟瑙﹀彂錛屾湁鐨勮璁℃垚鏃墮棿瑙﹀彂銆備笉璁鴻璁℃垚鍝閮戒笉鑳戒繚璇佸緢瀹岀編錛屽洜涓烘敹闆嗗櫒涔熸槸搴旂敤紼嬪簭(浠庢搷浣滅郴緇熷唴鏍哥殑瑙掑害鍘葷湅)錛屼篃鎺ュ彈璋冨害錛岀敱浜庢敹闆嗙殑鏄竴涓璞＄殑闆嗗悎(閫氬父鏄竴嬈℃敹闆嗗涓璞″崰鐢ㄧ殑璧勬簮)錛屽洜姝ゅ疄鏃舵�т笉澶ソ淇濊瘉錛屽挨鍏跺湪鍗曟牳蹇?jī)鐨勻q翠唬鍜岃綆楄兘鍔涗笉澶己鐨勫祵鍏ュ紡棰嗗煙灝や負(fù)紿佸嚭銆?/p><p style="background-color:transparent;">浠�涔堜簨鎯呮湁緙虹偣灝辨湁浼樼偣錛屽鏍稿績(jī)鐨勫勾浠ｅ氨濂藉浜?jiǎn)锛尀鍏跺綋CPU鍗犵敤鐜囦笉楂樹笖鍐呭瓨姣旇緝澶ф椂錛岃繖鏍囪娓呯悊鐨勫仛娉曞彲鑳借繕鏄瘮杈冧笉閿欑殑銆?/p><p style="background-color:transparent;"><strong>3. 鎷瘋礉</strong></p><p style="background-color:transparent;">鏈�濂界悊瑙ｇ殑灝辨槸鍗婂爢鎷瘋礉錛屽唴瀛樹竴鍒嗕負(fù)浜岋紝涓�杈規(guī)槸鏈夌敤瀵硅薄涓�杈規(guī)槸鏃犵敤瀵硅薄銆備粠鍫嗙┖闂?璇風(fēng)綉涓婃悳绱㈣繘紼嬬殑綰挎�у湴鍧�絀洪棿錛屾垜榪欓噷灝辨槸閭ｄ釜鎰忔�?鐨勪竴绔紑濮嬶紝涓嶅仠 鐨勬妸媧葷潃鐨勫璞″鍒跺埌鍙﹀涓�绔紝絳夎繖杈歸兘鍓╂鐨勫璞℃椂錛屾妸榪欐絀洪棿(涓�鍗婂爢鍐呭瓨)鏍囪涓虹┖闂層�傝�冭檻鍐呭瓨鍒╃敤鐜囧拰澶勭悊閫熷害鍘熷洜錛屽疄闄呭疄鐜頒腑寰堝鏃跺�欏彲涓嶄竴瀹?閲囩敤鍗婂爢鐨勫仛娉?鍙兘閲囩敤1/N鍫嗭紝N&gt;2)錛岃繖閲屾槸涓轟簡(jiǎn)渚夸簬鐞嗚В鎵嶇敤鍗婂爢鍋氫緥瀛愩�?/p><p style="background-color:transparent;">澶嶅埗灝忓璞″緢濂斤紝浣嗘槸澶嶅埗澶у璞′細(xì)姣旇緝鎱€�傚鍒惰矊浼兼渶綺楀姡鏈�涓嶅ソ鐨勫瀮鍦炬敹闆嗙畻娉曪紝鍏跺疄涓嶇劧錛屾兂鎯沖紩鐢ㄨ鏁板拰鏍囪娓呯悊閮戒笉鎼繍瀵硅薄錛屽洜姝ら暱鏃墮棿榪愯(鎯蟲兂鏈嶅姟鍣ㄨ兘鍔ㄤ笉鍔ㄥ氨鍏蟲満鍚楋紵)浼?xì)漶旂敓寰堝鍐呭瓨纰庣墖锛岃�屽鍒剁殑鍋氭硶鍒欑浉褰撲簬鍘嬬緝鍐呭瓨錛岄檷浣庡唴瀛樼鐗囷紝鎻愬崌鍐呭瓨鍒╃敤鐜囥�傛兂鎯蟲瀬绔儏鍐典笅鍚э紝鏈潵鏈夋帴榪?GB鍐呭瓨絀?闂?鍋囪鏈変釜2瀛楄妭鐨勫璞″垰濂戒綅浜庝腑闂?錛屾鏃剁敵璇?12MB浠ヤ笂鐨勫爢鍐呭瓨浼?xì)娉ㄥ畾澶辫触锛屽洜湄?fù)娌℃湁榪炵畫鐨?12MB鍐呭瓨鍙敤銆備笂榪板叾浠栫畻娉曢兘瑙ｅ喅涓嶄簡(jiǎn)榪欑闂錛?澶嶅埗鏀墮泦鐨勫仛娉曞嵈鑳藉緢濂界殑瑙ｅ喅榪欑闂銆?/p><p style="background-color:transparent;">瀵逛簬鏈夋寚閽堢殑C鍜孋++錛屽鍒剁殑鏀墮泦綆楁硶娌℃硶鐢紝鍥犱負(fù)榪欎細(xì)瀵艱嚧鎸囬拡鎮(zhèn)寕鍜岄噹鎸囬拡錛屽浜嶫ava絳夛紝榪欑鏀墮泦綆楁硶涔熻寰堜笉閿欍�傝窡鏍囪娓呯悊綾諱技錛岀敱浜庝竴嬈℃敹闆嗗涓璞″崰鐢ㄧ殑璧勬簮錛屽疄鏃舵�т篃鏄釜闂銆?/p><p style="background-color:transparent;"><strong>4. 鍒嗕唬鏀墮泦</strong></p><p style="background-color:transparent;">涓ユ牸鐨勮鍒嗕唬鏀墮泦涓嶅簲璇ョ畻綆楁硶錛屽簲璇ョ畻絳栫暐銆?br style="background-color:transparent;" /></p><p style="background-color:transparent;">璇瘋�(gè)冭檻浜虹殑瀹惰氨灝辮兘瀹規(guī)槗鐞嗚В澶氫簡(jiǎn)錛屾垨鑰呰�冭檻鏁版嵁緇撴瀯涓殑鏍?wèi)灞倠啤缁撴瀯锛岄亾鐞喚c諱技銆傚璞′篃鍙互鍒嗕唬錛屾樉鐒惰秺騫磋交鐨勫璞¤秺瀹規(guī)槗姝?璇瘋�(gè)冭檻浣滅敤鍩熺殑姒傚康錛屾垨鑰呮兂鎯矯++錛孞ava絳夌▼搴忛噷澶ф嫭寮ч噷鍜屽祵濂楃殑鍙橀噺涔熻)銆傚垎浠ｆ敹闆嗘槸鍚庢潵鎵嶅紩鍏ョ殑錛孞ava鍜孋#閲岄兘鏈夐噰綰熾�傚疄闄呮晥鏋滆〃鏄庯紝鍒嗕唬鏀墮泦姣斾笂闈㈤偅涓夌涓殑浠繪剰涓�縐嶆敹闆嗙畻娉曢兘濂界敤錛屽挨鍏跺鏉傚璞℃瘮杈冨鏃舵洿鏄姝わ紝鎶涘紑瀹炴椂鎬т笉璋堬紝鑷沖皯騫沖潎閫熷害姣旇緝蹇�?/p><p style="background-color:transparent;">鐜板疄涓紝鍟嗙敤棰嗗煙娌℃湁涓�縐嶅瀮鍦炬敹闆嗙畻娉曠壒鍒�傚悎鎵�鏈夊満鍚堬紝澶氭暟鍨冨溇鏀墮泦鍣ㄩ兘閲囩敤澶氱綆楁硶緇勫悎鏉ヨ璁°�傚鏁板瀮鍦炬敹闆嗗櫒閮芥槸騫跺彂鎵ц鐨勶紝鏈夌殑璁捐鍒欐槸涓�涓嚎紼嬪緇堝湪鏀墮泦鍨冨溇鍐呭瓨錛屽挨鍏跺湪澶氭牳鐨勫勾浠ｆ洿鏄姝ゃ�?/p><p style="background-color:transparent;"><br /></p><p style="background-color:transparent;"><strong>鍨冨溇鏀墮泦浼樼己鐐?/strong><br /></p><p style="background-color:transparent;">鍨?鍦炬敹闆嗗甫鏉ヤ簡(jiǎn)鏁頒笉灝界殑濂藉錛屽挨鍏朵粠杞歡宸ョ▼鐨勮搴﹀幓鑰冭檻鏃訛紝濂藉澶浜?jiǎn)锛寴q欏氨涓嶅緗楀棪浜?jiǎn)锛屼絾鏄篃浼?xì)闄嶄綆紼嬪簭鎵ц閫熷害錛屽挨鍏跺湪瀹炴椂鎬ц姹傞珮鐨勫満鍚堬紝鐪熷氨娌″皯瑙佺敤鍨冨溇鏀墮泦鍣ㄧ殑錛屾垨鑰呰繖鏍瘋錛屽湪楂樺疄鏃舵�х殑搴旂敤閲岋紝鐢–鍜孋++鍜屾眹緙栵紝鍦ㄤ竴鑸満鍚堜笅鐢↗ava,C#鐢氳嚦鑴氭湰閮借銆?/p>鍨冨溇鏀墮泦浼?xì)甯︽潵棰濆鐨勫唴瀛樺紑閿�錛屾垜瑙夊緱榪樻槸鏁版嵁鍖栨瘮杈冨鏄撶悊瑙ｏ紝鐞嗚涓婂悓鏍風(fēng)畻娉曚笅錛屾湁3鍊嶄互涓婄殑鍐呭瓨鏃訛紝Java浠ｇ爜鍙互杈懼埌C++浠ｇ爜鐨?0%浠ヤ笂閫熷害錛屽鏋滄兂杈懼埌鍚屾牱鐨勯�熷害錛孞ava浠ｇ爜闇�瑕佹秷鑰?鍊嶄簬C++浠ｇ爜鑰楄垂鐨勫唴瀛樸�傛敞鎰忔槸鐞嗚涓婏紝瀹為檯涓彲鑳借繕涓嶆榪欎釜鏁般�?/div><img src ="http://www.shnenglu.com/Chipset/aggbug/210402.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/Chipset/" target="_blank">Chipset</a> 2015-04-20 17:21 <a href="http://www.shnenglu.com/Chipset/archive/2015/04/20/210402.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>Why Java Will Always Be Slower Than C++?</title><link>http://www.shnenglu.com/Chipset/archive/2008/12/18/69739.html</link><dc:creator>Chipset</dc:creator><author>Chipset</author><pubDate>Thu, 18 Dec 2008 09:20:00 GMT</pubDate><guid>http://www.shnenglu.com/Chipset/archive/2008/12/18/69739.html</guid><wfw:comment>http://www.shnenglu.com/Chipset/comments/69739.html</wfw:comment><comments>http://www.shnenglu.com/Chipset/archive/2008/12/18/69739.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/Chipset/comments/commentRss/69739.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/Chipset/services/trackbacks/69739.html</trackback:ping><description><![CDATA[<h1 style="font-weight: normal;"></h1>
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<h1 style="font-weight: normal;">Why Java Will Always Be Slower than C++</h1>
<h1 style="font-weight: normal;"><em>by Dejan Jelovic</em></h1>
<h1 style="font-weight: normal;">&nbsp;<em><font size="4">"Java is high performance. By high performance we mean
adequate. By adequate we mean slow." </font></em><font size="4">- </font> <a >
<font size="4">Mr. Bunny</font></a></h1>
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&nbsp;&nbsp;&nbsp; 鑰嶈繃Java紼嬪簭錛屾垨鑰呯敤Java鐮佽繃紼嬪簭鐨勪漢閮芥檽寰楋紝Java瑕佹瘮鐢–++鍐欐垚鐨勫師鐢熺▼搴忚鎱€�傝繖鏄挶鐢↗ava鏃跺凡緇忔壙璁ょ殑浜嬪疄銆?br>銆�銆�涓嶈繃錛屽緢澶氫漢鎯寵璇存湇鎴戜滑璇磋繖鍙笉榪囨槸鏆傛椂鐨勶紝浠栦滑璇碕ava浠庤璁′笂鏉ヨ騫朵笉鎱紝鐩稿弽錛屽彧鏄幇鍦ㄧ殑JIT瀹炵幇鐩稿姣旇緝瀚╋紝鏈夊緢澶氳兘浼樺寲鐨勫湴鏂笿IT騫舵病鏈変紭鍖栧埌錛屾嫋浜?jiǎn)鍚庤呇潃傚叾瀹炰笉鐒?dòng)灱屼笉绠IT浠鐗涳紝Java姘歌繙瑕佹瘮C++鎱€�?br>銆�銆�<br>銆�銆�鎴戞兂璇?..<br>銆�銆�瀹ｆ壃Java涓嶆參浜嶤++鐨勪漢寰�寰�鏄寰楋紝錛堣娉曪級(jí)涓ユ牸鐨勮璦�錛屽彲浠ヨ緙栬瘧鏈夋洿澶х殑浼樺寲絀洪棿銆傚洜姝わ紝闄ら潪浣犳兂鍋氫漢鑲夌紪璇戝櫒浼樺寲鏁翠釜紼嬪簭錛屽惁鍒欓�氬父閮芥槸緙栬瘧鍣ㄥ仛寰楁洿濂姐�?br>銆�銆�榪欐槸鐪熺殑銆傚湪鏁板�艱綆楅鍩燂紝Fortran浠嶇劧鑳滀簬C++錛岀殑紜洜涓哄畠鏇翠弗鏍箋�備笉鐢ㄦ媴蹇?jī)鎸囬拡鐬庢悈鍜屽Q岀紪璇戝櫒鍙互鏇村畨蹇?jī)鍦颁紭鍖栥�侰++鎯蟲墦璐ortran鐨勫敮涓�鍔炴硶錛屽氨鏄ソ濂借璁′竴涓儚Blitz++閭ｆ牱鐨勫簱銆?br><br>銆�銆�嫻嬭瘯...<br>
Java鍙互璺熷緱涓奀++鐨勫湴鏂癸紝灝辨槸鍩哄噯嫻嬭瘯銆傝綆楄搗絎琋涓枑娉㈢撼濂戞暟錛屾垨鑰呰繍琛岃搗Linpack錛孞ava娌＄悊鐢變笉璺烠++璺戝緱涓�鏍峰揩銆傚綋鎵�鏈夌殑璁?
綆楅兘鏀懼湪涓�涓被閲岋紝騫朵笖鍙嬌鐢ㄥ熀鏈殑鏁版嵁綾誨瀷錛屾瘮濡傝int鎴栬�卍ouble鏃訛紝Java緙栬瘧鍣ㄧ殑紜兘璺熷緱涓奀++鐨勮剼姝ャ�?br><br>銆�銆�浜嬪疄...<br>銆�銆�褰撳紑濮嬪湪紼嬪簭涓嬌鐢ㄥ璞＄殑鏃跺�欙紝Java灝辨斁鏉句簡(jiǎn)娼滃湪鐨勪紭鍖栥�傝繖涓�鑺備細(xì)鍛婅瘔浣犱負(fù)浠�涔堛�?br><br>銆�銆�1.&nbsp;鎵�鏈夌殑瀵硅薄閮芥槸浠庡爢閲屽垎閰嶇殑銆?br>銆�銆�Java浠庢爤閲屽垎閰嶇殑錛屽氨鍙湁鍩烘湰鏁版嵁綾誨瀷錛屽int錛屾垨鑰卍ouble錛岃繕鏈夊璞＄殑寮曠敤銆傛墍鏈夌殑瀵硅薄閮芥槸浠庡爢閲屽垎閰嶇殑銆?br>銆�銆�褰撴湁澶ч噺璇箟涓婃槸涓�鍥炰簨鐨勫璞℃椂錛岃繖涓嶆垚闂銆侰++鍚屾牱涔熸槸浠庡爢涓婂垎閰嶈繖浜涘璞°�備絾鏄紝褰撴湁鍊艱涔変笉鍚岀殑灝忓璞℃椂錛岃繖灝辨槸涓�涓富瑕佺殑鎬ц兘鏉�鎵嬨�?br>
浠�涔堟槸灝忓璞★紵瀵規(guī)垜鏉ヨ錛屽氨鏄凱浠ｅ櫒浠�傚湪璁捐涓紝鎴戠敤浜?jiǎn)寰堝鑴P浠ｅ櫒銆傚埆浜哄彲鑳戒細(xì)鐢ㄥ鏁般�?D紼嬪簭鍛樺彲鑳戒細(xì)鐭㈤噺鎴栬�呯偣綾匯�傚鐞嗘椂闂村簭鍒楃殑浜哄彲鑳戒細(xì)鏈夋椂闂?
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