解釋node.js配置文件輸出？

test.js解釋node.js配置文件輸出？

function test(){ 
    for(var i=0; i<2000000000; ++i); 
}; 
test();

命令用於剖析它：

node --prof test.js 
nprof

輸出：

line 249: unknown code state: undefined 
line 252: unknown code state: undefined 
line 253: unknown code state: undefined 
line 256: unknown code state: undefined 
line 258: unknown code state: undefined 
line 259: unknown code state: undefined 
line 260: unknown code state: undefined 
line 261: unknown code state: undefined 
line 262: unknown code state: undefined 
line 263: unknown code state: undefined 
line 264: unknown code state: undefined 
line 265: unknown code state: undefined 
line 266: unknown code state: undefined 
(This repeats around 1000 times. I'm removing it from this paste...) 

[Unknown]: 
    ticks total nonlib name 
    34 79.1% 

[Shared libraries]: 
    ticks total nonlib name 
     8 18.6% 0.0% /usr/local/bin/node 
     1 2.3% 0.0% /usr/lib/system/libsystem_kernel.dylib 

[JavaScript]: 
    ticks total nonlib name 

[C++]: 
    ticks total nonlib name 

[GC]: 
    ticks total nonlib name 
     0 0.0% 

[Bottom up (heavy) profile]: 
    Note: percentage shows a share of a particular caller in the total 
    amount of its parent calls. 
    Callers occupying less than 2.0% are not shown. 

    ticks parent name 
     8 18.6% /usr/local/bin/node 

     1 2.3% /usr/lib/system/libsystem_kernel.dylib

我期待它表現出的[JavaScript的]中的「測試」功能部分。爲什麼它不在那裏？

來源

2013-06-29 MaiaVictor

什麼版本的節點？使用0.8.2（例如）我使用你的程序，並得到我期望的輸出，而不像我在帖子中看到的那樣。我的輸出在這裏：http://pastebin.com/embed_js.php?i=mztwZLfd – Joe

@Joe，0.8.2我剛剛建立在OSX上。奇怪的。 – MaiaVictor

nprof採用剔處理器從你有什麼我有在node-tick相同issue（這是目前與節點0.8.2 AFAIK兼容）

不同v8.log格式。

可能的解決方案：

嘗試node-tick
嘗試nprof的前一版本（npm install [email protected]）

，或者你可以嘗試重建nprof從您的節點版本腳本：

git clone https://github.com/bnoordhuis/node-profile 
    git clone https://github.com/joyent/node 
    cd node 
    git checkout v0.8.7-release # can't see tag for 0.8.2 
    cp deps/v8/tools/*.js ../node-profile/tools/v8 
    cd ../node-profile 
    sh tools/build-nprof

來源

2013-06-29 23:30:56

解釋node.js配置文件輸出？

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