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Date: Sat, 05 Apr 2014 16:18:12 +0000
From: "Poul-Henning Kamp" <>
To:, Peter Maxwell <>
Subject: Re: [PHC] Mechanical tests (was: POMELO fails the dieharder tests)

In message <>
, Peter Maxwell writes:

>> So one of my ideas for "mechanical tests" was to use compressors
>> as measurement entropy, and run sanity-checking test along the
>> general scheme of:
>>         Generate_test_data > file1
>>         candidate_algorithm < file1 > file2
>>         gzip -9v file1 file2
>> Any algorithm where file2.gz can be smaller than file1.gz is toast.
>That won't tell you whether you lose entropy but rather whether a series of
>results tested is amenable to a specific compression algorithm.

"One of my ideas" :-)

Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
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