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Benchmarking it on my machine shows the multi line version running faster than the one liner.
use Benchmark; @array = ('elementary school', 'blah blah blah', 'stuff', 'hello', 'ya +y'); timethese(100000, { 'one line' => '&one_line', 'multi line' => '&multi_line'}); sub one_line { do {s/\s+/\t/; s/elementary/my dear Watson/g;} for @array; } sub multi_line { for ( @array ) { s/\s+/\t/; s/elementary/my dear Watson/g; } }

Output:
multi line: 5 wallclock secs ( 5.04 usr + -0.01 sys = 5.03 CPU) @ 19880.72/s (n=100000)
one line: 5 wallclock secs ( 5.72 usr + 0.00 sys = 5.72 CPU) @ 17482.52/s (n=100000)

In reply to Re: Does it Iactually/I run faster? by nardo
in thread Does it Iactually/I run faster? by greenhorn

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    [stevieb]: it's a reminder to re-inforce it :P
    [atcroft]: james28909: That particular questions was a bit of trick, actually (depending on the country you are in). More interesting is, if you are trying to subtract from an epoch time, for instance, you might have to consider when/if DST occurs for a location,
    [atcroft]: because you may have to adjust the number of seconds you change from an epoch from 86400 (not to mention leap seconds)....
    [atcroft]: james28909: Although if your program is using a database, you might be able to "pass the buck" to the database and ask it to do the date change for you....

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