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diff --git a/triehash/README.md b/triehash/README.md deleted file mode 100644 index d6f6e7fc3..000000000 --- a/triehash/README.md +++ /dev/null @@ -1,58 +0,0 @@ -# Order-preserving minimal perfect hash function generator - -Build order-preserving minimal perfect hash functions. - -[](https://codecov.io/gh/julian-klode/triehash) -[](https://travis-ci.org/julian-klode/triehash) - -## Performance - -Performance was evaluated against other hash functions. As an input set, the -fields of Debian Packages and Sources files was used, and each hash function -was run 1,000,000 times for each word. The byte count of the words were then -summed up and divided by the total number of nanoseconds each function ran, so -all speeds below are given in bytes per nanosecond, AKA gigabyte per second. - -arch/function|jak-x230 (amd64)|backup (amd64)|asachi.d.o (arm64)|asachi.d.o (armel)|asachi.d.o (armhf)|plummer.d.o (ppc64el)|eller.d.o (mipsel) --------------|----------------|--------------|------------------|------------------|------------------|---------------------|------------------ -Trie | 2.4 | 1.9 | 1.2 | 0.9 | 0.8 | 2.0 | 0.2 -Trie (*) | 2.2 | 1.7 | 0.8 | 0.7 | 0.7 | 1.8 | 0.2 -re2c | 1.7 | 1.3 | 0.9 | 0.9 | 0.7 | 1.6 | 0.2 -re2c (*) | 1.2 | 0.9 | 0.6 | 0.6 | 0.5 | 1.1 | 0.1 -gperf (*) | 0.7 | 0.5 | 0.2 | 0.2 | 0.2 | 0.5 | 0.1 -gperf | 1.3 | 0.9 | 0.3 | 0.3 | 0.2 | 0.4 | 0.1 -djb (*) | 0.7 | 0.5 | 0.3 | 0.3 | 0.3 | 0.5 | 0.1 -djb (**) | 1.0 | 0.7 | 0.4 | 0.5 | 0.5 | 0.6 | 0.2 -djb | 0.9 | 0.7 | 0.5 | 0.5 | 0.5 | 0.7 | 0.2 -apt (*) | 1.2 | 0.9 | 0.7 | 0.7 | 0.7 | 1.1 | 0.2 -apt (**) | 2.3 | 1.7 | 0.7 | 0.9 | 0.8 | 1.9 | 0.2 - -And transposed: - -function/arch |Trie |Trie (*) |re2c |re2c (*) |gperf (*)|gperf |djb (*) |djb (**) |djb |apt (*) |apt (**) ----------------------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|--------- -jak-x230 (amd64) | 2.4| 2.2| 1.7| 1.2| 0.7| 1.3| 0.7| 1.0| 0.9| 1.2| 2.3 -backup (amd64) | 1.9| 1.7| 1.3| 0.9| 0.5| 0.9| 0.5| 0.7| 0.7| 0.9| 1.7 -asachi.d.o (arm64) | 1.2| 0.8| 0.9| 0.6| 0.2| 0.3| 0.3| 0.4| 0.5| 0.7| 0.7 -asachi.d.o (armel) | 0.9| 0.7| 0.9| 0.6| 0.2| 0.3| 0.3| 0.5| 0.5| 0.7| 0.9 -asachi.d.o (armhf) | 0.8| 0.7| 0.7| 0.5| 0.2| 0.2| 0.3| 0.5| 0.5| 0.7| 0.8 -plummer.d.o (ppc64el)| 2.0| 1.8| 1.6| 1.1| 0.5| 0.4| 0.5| 0.6| 0.7| 1.1| 1.9 -eller.d.o (mipsel) | 0.2| 0.2| 0.2| 0.1| 0.1| 0.1| 0.1| 0.2| 0.2| 0.2| 0.2 - - -Legend: - -* The (*) variants are case-insensitive, (**) are more optimised versions - of the (*) versions. -* DJB (*) is a DJB Hash with naive lowercase conversion, DJB (**) just ORs one - bit into each value to get alphabetical characters to be lowercase -* APT (*) is the AlphaHash function from APT which hashes the last 8 bytes in a - word in a case-insensitive manner. APT (**) is the same function unrolled. -* All hosts except the x230 are Debian porterboxes. The x230 has a Core i5-3320M, - barriere has an Opteron 23xx. - -Notes: - -* The overhead is larger than needed on some platforms due to gcc inserting - unneeded zero extend instructions, see: - https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77729 |