Is this known and being looked into? I've seen a jump from 12 seconds to over 9 minutes with running git tag --contains on my kernel repo. snits ~/dev/linux> git --version git version 2.6.1.145.gb27dacc snits ~/dev/linux> time git tag --contains 825fcfc next-20151012 next-20151013 v4.3-rc5 real 9m4.765s user 8m56.157s sys 0m2.450s snits ~/dev/linux> git --version git version 2.5.0.275.gac4cc86 snits ~/dev/linux> time git tag --contains 825fcfc next-20151012 next-20151013 v4.3-rc5 real 0m12.842s user 0m11.536s sys 0m1.098s b7cc53e92c806b73e14b03f60c17b7c29e52b4a4 is the first bad commit commit b7cc53e92c806b73e14b03f60c17b7c29e52b4a4 Author: Karthik Nayak <karthik.188@xxxxxxxxx> Date: Fri Sep 11 20:36:16 2015 +0530 tag.c: use 'ref-filter' APIs Make 'tag.c' use 'ref-filter' APIs for iterating through refs, sorting and printing of refs. This removes most of the code used in 'tag.c' replacing it with calls to the 'ref-filter' library. Make 'tag.c' use the 'filter_refs()' function provided by 'ref-filter' to filter out tags based on the options set. For printing tags we use 'show_ref_array_item()' function provided by 'ref-filter'. We improve the sorting option provided by 'tag.c' by using the sorting options provided by 'ref-filter'. This causes the test 'invalid sort parameter on command line' in t7004 to fail, as 'ref-filter' throws an error for all sorting fields which are incorrect. The test is changed to reflect the same. Modify documentation for the same. Mentored-by: Christian Couder <christian.couder@xxxxxxxxx> Mentored-by: Matthieu Moy <matthieu.moy@xxxxxxxxxxxxxxx> Signed-off-by: Karthik Nayak <karthik.188@xxxxxxxxx> Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx> -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html