我怎么在Perl中睡一个毫秒？

How do I sleep for shorter than a second in Perl?

我怎么在Perl中睡不到一秒钟？

6 个解决方案

#1

From the Perldoc page on sleep:

从睡眠中的Perldoc页面：

For delays of finer granularity than one second, the Time::HiRes module (from CPAN, and starting from Perl 5.8 part of the standard distribution) provides usleep().

对于比一秒钟更精细的延迟，Time :: HiRes模块（来自CPAN，从标准分布的Perl 5.8部分开始）提供了usleep（）。

Actually, it provides usleep() (which sleeps in microseconds) and nanosleep() (which sleeps in nanoseconds). You may want usleep(), which should let you deal with easier numbers. 1 millisecond sleep (using each):

实际上，它提供了usleep（）（以微秒为单位）和nanosleep（）（以纳秒为单位）。你可能想要usleep（），它可以让你处理更容易的数字。 1毫秒睡眠（使用每个）：

use strict;
use warnings;

use Time::HiRes qw(usleep nanosleep);

# 1 millisecond == 1000 microseconds
usleep(1000);
# 1 microsecond == 1000 nanoseconds
nanosleep(1000000);

If you don't want to (or can't) load a module to do this, you may also be able to use the built-in select() function:

如果您不想（或不能）加载模块来执行此操作，您也可以使用内置的select（）函数：

# Sleep for 250 milliseconds
select(undef, undef, undef, 0.25);

#2

Time::HiRes:

时间::高分辨率：

  use Time::HiRes;
  Time::HiRes::sleep(0.1); #.1 seconds
  Time::HiRes::usleep(1); # 1 microsecond.

http://perldoc.perl.org/Time/HiRes.html

#3

From perlfaq8:

来自perlfaq8：

How can I sleep() or alarm() for under a second?

如何在一秒钟内睡觉（）或闹钟（）？

If you want finer granularity than the 1 second that the sleep() function provides, the easiest way is to use the select() function as documented in select in perlfunc. Try the Time::HiRes and the BSD::Itimer modules (available from CPAN, and starting from Perl 5.8 Time::HiRes is part of the standard distribution).

如果你想要比sleep（）函数提供的1秒更精细的粒度，最简单的方法是使用select in perlfunc中记录的select（）函数。尝试Time :: HiRes和BSD :: Itimer模块（可从CPAN获得，从Perl 5.8开始Time :: HiRes是标准发行版的一部分）。

#4

Use Time::HiRes.

使用Time :: HiRes。

#5

A quick googling on "perl high resolution timers" gave a reference to Time::HiRes. Maybe that it what you want.

关于“perl高分辨率计时器”的快速Google搜索提供了对Time :: HiRes的引用。也许这就是你想要的。

#6

-3

system "sleep 0.1";

does the trick.

诀窍。

#1