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Johanna Amann 5e7915ae7a Remove the siphash->hmac-md5 switch after 36 bytes. 
Currently, siphash is used for strings up to 36 bytes. hmac-md5 is used
for longer strings.

This switch-over is a remnant of the previous hash-function that was
used, which apparently was slower with longer input strings.

This change serves no purpose anymore. I performed a few performance tests
on strings of varying sizes:

For a 40 byte string with 10 million iterations:

siphash: 0.31 seconds
hmac-md5: 3.8 seconds

For a 1080 byte string with 10 million iterations:

siphash: 4.2 seconds
hmac-md5: 17 seconds

For a 18360 byte string with 10 million iterations:

siphash: 69 seconds
hmac-md5: 240 seconds

Hence, this commit removes the use of hmac-md5.

This change causes reordering of lines in a few logs.

This commit also changes the datastructure for the seed in probabilistic/Hasher
to get rid of a type-punning warning.
2020-04-24 13:14:29 -07:00
..
btest Remove the siphash->hmac-md5 switch after 36 bytes. 2020-04-24 13:14:29 -07:00
coverage More bro-to-zeek renaming in the unit tests 2019-05-16 02:27:54 -05:00
external Merge branch 'topic/johanna/gh-744-cache-the-heck-out-of-these-certs' 2020-03-12 13:44:07 -07:00
scripts Add Cirrus CI config 2019-12-17 15:28:25 -08:00
.gitignore
Makefile Added coverage to .PHONY in Makefile due to testing/coverage 2018-07-30 12:17:40 -07:00
README More bro-to-zeek renaming in the unit tests 2019-05-16 02:27:54 -05:00

README 

This directory contains suites for testing for Zeek's correct
operation:

    btest/
        An ever-growing set of small unit tests testing Zeek's
        functionality.

    external/
        A framework for downloading additional test sets that run more
        complex Zeek configuration on larger traces files. Due to their
        size, these are not included directly. See the README for more
        information. 

    scripts/
        Helpers scripts used by some tests.