grep with --extended-regexp much slower on Ubuntu 16.04

[Karl Auer]

On Thu, 2018-02-08 at 16:42 +0000, Brian Bird wrote:
> Eg. On Ubuntu 14.04
> # openssl rand -out /tmp/random.txt -base64 100000000; time grep --
> extended-regexp "[0-9]{10}$" /tmp/random.txt

It's possible that the generation of random data is taking longer on
one than the other. For this sort of test, you want to make sure that
the test is using the same data on both systems. Pre-generate those
chunk of random data and use the same chunks on both systems.

Regards, K.

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Karl Auer (kauer at biplane.com.au)
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