OMG text processing performance 6.7 - 9.5

Richard Gaskin ambassador at
Sat Feb 1 03:17:50 EST 2020

Ralph DiMola wrote:
> I found this as well. Another thing, it's faster to truncate the string and
> search from the beginning than using a "start at" on the entire string when
> searching for all occurrences of a string . This was counter intuitive to me
> until Mark explained that skipping chars requires more work because
> repetitive skipping of Unicode chars is slower than many "memcpy"s on very
> long strings.

Very interesting - thanks for noting that.  It's counterintuitive, but 
it sure shows:

I ran a quick test searching for all offsets for the string "Spitz" in 
the Gutenberg text file for Jack London's "Call of the Wild" - here are 
the results:

377 ms for 'start at'
  56 ms for deletion

  Richard Gaskin
  Fourth World Systems

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