[Bugs] [Bug 1710371] New: Minor improvements across codebase for performance gain

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1710371

            Bug ID: 1710371
           Summary: Minor improvements across codebase for performance
                    gain
           Product: GlusterFS
           Version: mainline
            Status: NEW
         Component: core
          Keywords: Performance, Tracking
          Severity: high
          Priority: high
          Assignee: bugs at gluster.org
          Reporter: atumball at redhat.com
                CC: bugs at gluster.org
  Target Milestone: ---
    Classification: Community



Description of problem:
There are many places in glusterfs code, where we can do minor improvements to
handle CPU cycles better.

* No need for memset().
* Initializing large array!
* revisit locked regions, and see if it can be optimized.
* Reduce call to library functions, instead  cache some results.
* other such minor improvements, which would help overall performance.

Version-Release number of selected component (if applicable):
master


Expected results:
With focus on such improvement, we expect better CPU utilization, which means
better performance in the long run.

Additional info:
This bug can be a tracker bug, and hence this shouldn't be closed as long as we
feel we have good performance.

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