[Bug 93681] GLSL compilation can be very slow

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=93681

            Bug ID: 93681
           Summary: GLSL compilation can be very slow
           Product: Mesa
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: glsl-compiler
          Assignee: idr at freedesktop.org
          Reporter: marcandre.lureau at gmail.com
        QA Contact: intel-3d-bugs at lists.freedesktop.org

Created attachment 120988
  --> https://bugs.freedesktop.org/attachment.cgi?id=120988&action=edit
slow.shader_test

It seems the glsl compiler isn't that great wrt performance. Please find
attached a reasonably sized shader that takes >1m30s to compile:

time piglit/bin/shader_runner slow.shader_test -auto
PIGLIT: {"result": "pass" }

real    1m47.913s
user    1m47.676s
sys    0m0.239s


Similar bug is 87103

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