查看程序运行时间的代码

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原创最新推荐文章于 2026-07-04 13:31:09 发布 4.3k 阅读 AI 写同款· GEO 优化 ›

在PyCharm中查看Python程序的运行时间 在弹出的对话框中，选择一个合适的项目位置并设置项目名称，然后点击"Create"（创建）按钮。要运行Python程序，您可以右键单击Python文件，然后选择"Run"（运行）->“Run ‘filename’”（运行文件名）。在我们的示例中，选择"Run ‘main’"。在您的Python项目中，右键单击项目文件夹，然后选择"New"（新建）->“Python File”（Python文件）来创建一个新的Python文件。在新创建的Python文件中，您可以编写您的Python程序。阅读详情

How to Time

I was asked three times last week how I find how long an activity takes on the Mac and the iPhone. Here is the most accurate method that I know of:

#import <mach/mach_time.h>

uint64_t start = mach_absolute_time();

// do stuff to be timed

uint64_t end = mach_absolute_time();
uint64_t elapsed = end - start;

mach_timebase_info_data_t info;
if (mach_timebase_info (&info) != KERN_SUCCESS) {
    printf ("mach_timebase_info failed/n");
}

uint64_t nanosecs = elapsed * info.numer / info.denom;
uint64_t millisecs = nanosecs / 1000000;

As you use this, remember that the elapsed time for a given function will vary with the load the system is under.

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