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lib/compression: script to test 3 byte hash

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Compression uses a 3 byte hash remember LZ77 matches in a 14-bit table.
This script runs the hash over all 16M combinations, then again over
all ASCII combinations, counting collisions to find hot-spots.

If you think you have a better hash, you are probably right, but you
should try it here -- alter h() -- before committing to it. This one is
literally the first one I thought of.

Signed-off-by: Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
This commit is contained in:
Douglas Bagnall
2022-11-22 08:35:14 +13:00
committed by Joseph Sutton
parent dadecede54
commit 7804570a37
2 changed files with 50 additions and 0 deletions
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python/samba/tests/usage.py
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@@ -116,6 +116,7 @@ EXCLUDE_USAGE = {
'python/samba/tests/krb5/claims_tests.py',
'python/samba/tests/krb5/lockout_tests.py',
'python/samba/tests/krb5/group_tests.py',
'lib/compression/tests/scripts/three-byte-hash',
}
EXCLUDE_HELP = {