> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/perl6-rosettacode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/perl6-rosettacode/programming_tasks/t/time_a_function.md).

# Time a function

Follows modern trend toward measuring wall-clock time, since CPU time is becoming rather ill-defined in the age of multicore, and doesn't reflect IO overhead in any case.

```perl
my $start = now;
(^100000).pick(1000);
say now - $start;
```

#### Output:

```
0.02301709
```