TWikiStoreQueryAlgorithmsBruteForceDotPm < TWiki

TWiki Web>TWikiStoreQueryAlgorithmsBruteForceDotPm (2008-01-22, TWikiContributor) (raw view)

---+ Package =TWiki::Store::QueryAlgorithms::BruteForce=

Default brute-force query algorithm

Has some basic optimisation: it hoists regular expressions out of the
query to use with grep, so we can narrow down the set of topics that we
have to evaluate the query on.

Not sure exactly where the breakpoint is between the
costs of hoisting and the advantages of hoisting. Benchmarks suggest
that it's around 6 topics, though this may vary depending on disk
speed and memory size. It also depends on the complexity of the query.


%TOC%

Topic revision: r1 - 2008-01-22 - TWikiContributor

TWiki

Webs
LAPPD
Sandbox
TWiki

Copyright © 1999-2025 by the contributing authors. All material on this collaboration platform is the property of the contributing authors.
Ideas, requests, problems regarding TWiki? Send feedback
Note: Please contribute updates to this topic on TWiki.org at TWiki:TWiki.TWikiStoreQueryAlgorithmsBruteForceDotPm.