Opened 16 years ago

Last modified 10 years ago

#126 new enhancement

add faster checksum algorithm

Reported by: westram Owned by: devel
Priority: normal Milestone:
Component: no idea Version: SVN
Keywords: Cc:


  • add as additional algorithm (e.g. GBS_fast_checksum)
  • use GBS_fast_checksum for checksum calculation in PT-Server and when calculating checksum which is sent to PT-Server
  • other calls to GBS_checksum:
    • keep if result was stored in DB (e.g. acc generated by ARB or ACI command)
    • locations where checksum is only used temporarily (e.g. to control whether sequence was changed by mistake) can use GBS_fast_checksum

Change History (3)

comment:1 Changed 15 years ago by westram

  • Owner changed from baderk to westram

comment:2 Changed 10 years ago by westram

  • Owner changed from westram to devel

comment:3 Changed 10 years ago by epruesse

SSE 4.2 added a CRC32C instruction, so I'm pretty sure that this will be faster than Adler-32 on modern CPUs.

It'd probably be best to leave this to a lib that deals with picking the proper implementation for a given CPU (and is updated as new CPUs come out). gcrypt and crcutil might be candates.

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