Grep 3.7 Released To Fix "Extreme Performance Degradation"

Written by Michael Larabel in GNU on 15 August 2021 at 07:00 AM EDT. 37 Comments
If you have noticed grep regressing performance-wise in recent releases, you may want to upgrade to GNU Grep 3.7 released this weekend as it fixes a nasty performance regression.

GNU Grep is widely-used by programmers, system administrators, and others for searching textual data from the command-line. Grep 3.7's release is primarily driven by a fix for "extreme performance degradation" plaguing recent Grep releases.

This fixes a bug in grep where pre-processing N patterns could take at least O(N^2) time when too many patterns hashed too few buckets. Some commands could take days rather than seconds. Or even some grep searches that normally would complete in under one second were now taking many seconds.

The fix was in place since the end of last year following the Grep 3.6 release albeit didn't see a new stable release until this weekend.

Downloads and more details on Grep 3.7 via with this bug fix leading the new release.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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