D:\perl> perl -MBenchmark -e "timethese( 1000000, { doubles => sub { my $interpolated = \"pomperipossa\" }, singles => sub {my $uninterpolated = 'pomperipossa' } } )"

Gives these results:

Benchmark: timing 1000000 iterations of doubles, singles...

doubles:  0 wallclock secs ( 0.46 usr +  0.00 sys =  0.46 CPU) @ 2169197.40/s (n=1000000)

singles:  0 wallclock secs ( 0.45 usr +  0.00 sys =  0.45 CPU) @ 2217294.90/s (n=1000000)

So in this (highly unrealistic) case, singles seem infinitesimally faster. I use singles for things I think will be constant, and doubles only when I actually want interpolation. But this is nothing to do with alleged speed benefits, and everything to do with making my intentions clear.

In reply to Re^3: Differences between " " and ' '? by polypompholyx
in thread Differences between " " and ' '? by Ace128

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