On Sat, May 23, 2020 at 10:33:43PM +0530, Amit Khandekar wrote: > By inlining of the two functions, found noticeable reduction in > execution time as shown (figures are in milliseconds, averaged over > multiple runs; taken from 'explain analyze' execution times) : > ARM VM : > HEAD : 100 ; Patched : 88 => 13.6% improvement > x86 VM : > HEAD : 71 ; Patched : 66 => 7.63% improvement. > > Then I included many assignment statements as shown in attachment > assignmany.sql. This showed further benefit : > ARM VM : > HEAD : 1820 ; Patched : 1549 => 17.5% improvement > x86 VM : > HEAD : 1020 ; Patched : 869 => 17.4% improvement > > Inlining just exec_stmt() showed the improvement mainly on the arm64 > VM (7.4%). For x86, it was 2.7% > But inlining exec_stmt() and exec_cast_value() together showed > benefits on both machines, as can be seen above.
This stuff is interesting. Do you have some perf profiles to share? I am wondering what's the effect of the inlining with your test cases. -- Michael
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