GIT_TRACE_PERFORMANCE and pager

From: Christian Couder <christian.couder@gmail.com>
Date: Feb 29, 2016, 11:25 UTC
Message-ID: <CAP8UFD2zFBV7gRVvLB-gGEB=cfZJmYKrfiD2vdTdxgEgYU6jHQ@mail.gmail.com>

Hi,

It looks like setting GIT_TRACE_PERFORMANCE to 1 or 2 (for stdout or stderr) does not always work well with commands that use a pager, for example:

-------------

> GIT_TRACE_PERFORMANCE=2 git log -1

commit f02fbc4f9433937ee0463d0342d6d7d97e1f6f1e
Author: Junio C Hamano <gitster@pobox.com>
Date:   Fri Feb 26 13:45:26 2016 -0800

    Git 2.8-rc0

    Signed-off-by: Junio C Hamano <gitster@pobox.com>
-------------

In the above the GIT_TRACE_PERFORMANCE output is missing.

When I use "--no-pager", I get the GIT_TRACE_PERFORMANCE output:

-------------

> GIT_TRACE_PERFORMANCE=2 git --no-pager log -1

commit f02fbc4f9433937ee0463d0342d6d7d97e1f6f1e
Author: Junio C Hamano <gitster@pobox.com>
Date:   Fri Feb 26 13:45:26 2016 -0800

    Git 2.8-rc0

    Signed-off-by: Junio C Hamano <gitster@pobox.com>
12:16:31.258462 trace.c:420             performance: 0.001415428 s:
git command: 'git' '--no-pager' 'log' '-1'
-------------

Setting GIT_TRACE to 1 or 2 seems to work, but maybe it is because it outputs stuff at the beginning of the process and not at the end.

Cheers, Christian.