Question

我的节点应用程序（通过webpack dev服务器运行）持续占用60％的CPU。从cpu配置文件看起来，调用_proc_listpidspath是罪魁祸首。有关此函数调用的任何提示，以及如何查找哪个节点库调用此函数。

感谢。

请参阅下面的个人资料。

Code move event for unknown code: 0x19cac90226c0
Code move event for unknown code: 0x19cac90b3360
Code move event for unknown code: 0x19caca55d3a0
Statistical profiling result from isolate-0x102004c00-v8.log, (209273 ticks, 2592 unaccounted, 0 excluded).

 [Shared libraries]:
   ticks  total  nonlib   name
   6896    3.3%          /usr/lib/system/libsystem_c.dylib
    285    0.1%          /usr/lib/system/libsystem_pthread.dylib

 [JavaScript]:
   ticks  total  nonlib   name
    332    0.2%    0.2%  KeyedLoadIC: A keyed load IC from the snapshot {1}
    287    0.1%    0.1%  Stub: LoadICStub
    ....
    ....
  [Summary]:
   ticks  total  nonlib   name
   5271    2.5%    2.6%  JavaScript
  194229   92.8%   96.1%  C++
   1481    0.7%    0.7%  GC
   7181    3.4%          Shared libraries
   2592    1.2%          Unaccounted
[C++]:
  ticks  total  nonlib   name
 162560   77.7%   80.4%  _proc_listpidspath
  4417    2.1%    2.2%  _uv_timer_stop
  1683    0.8%    0.8%  _heap_node_swap
  1274    0.6%    0.6%  _timer_cb
  1006    0.5%    0.5%  _hex
   762    0.4%    0.4%  _uv_fs_stat
   704    0.3%    0.3%  _mach_vm_map
   677    0.3%    0.3%  _szone_check_all
   654    0.3%    0.3%  _pthread_join$NOCANCEL
   637    0.3%    0.3%  __pthread_exit
   583    0.3%    0.3%  _uv__run_timers
   583    0.3%    0.3%  _dec
   ......
   ......

[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
 162560   77.7%  _proc_listpidspath

  6896    3.3%  /usr/lib/system/libsystem_c.dylib

  4417    2.1%  _uv_timer_stop

编辑：

我可以将它隔离到它发生的时候。我昨天开始使用yarn。现在，如果我删除node_modules并运行npm -i以通过npm客户端安装所有deps，我会在node_modules中看到文件计数为

node_modules ❯❯❯ find . -print | wc -l                                                                                                                                   master
   43058

如果我删除node_modules并运行~/.yarn/bin/yarn.js，那么

node_modules ❯❯❯ find . -print | wc -l                                                                                                                                 ⏎ master
   32138

因此，cli安装的文件存在差异，而纱线安装量较少。但是，带有纱线的cpu闲置率为80％（监视模式下的webpack服务器），npm为1％。!!

Answer 1

这可能是由于纱线跳过了chokidar。这些问题在yarnpkg跟踪器上公开，等待修复。

https://github.com/yarnpkg/yarn/issues/1009 https://github.com/yarnpkg/yarn/issues/629

节点应用程序

1 个答案: