Commits on Feb 4, 2024

1. add Image.SubImageInto method …

   Instead of allocating the result on heap for the user,
   allow the caller side to decide whether it should be heap-allocated
   or stack-allocated.
   
   This new method allows us to have a zero-alloc SubImage routine
   for the use cases where we don't want to make an extra allocation.
   
   The performance difference is measurable (comparison is done with benchstat):
   
   	name             old time/op    new time/op    delta
   	SubImage-12     203ns ± 2%      33ns ± 2%   -83.91%  (p=0.000 n=20+19)
   
   	name             old alloc/op   new alloc/op   delta
   	SubImage-12      112B ± 0%        0B       -100.00%  (p=0.000 n=20+20)
   
   Using SubImage is `~203ns`, SubImageInto is `~33ns`.
   SubImage does 1 allocation, SubImageInto does none.
   
   SubImage is rewritten in a way to avoid the code duplication.
   It should work identically to the previous contract (it returns nil
   if `i` is disposed, etc.)
   
   Fixes hajimehoshi#2902

   

   quasilyte committed Feb 4, 2024
   Configuration menu

   • View commit details
   • Copy full SHA for 1ea88db
   • Browse repository at this point

   Copy the full SHA

   1ea88db View commit details

   Browse the repository at this point in the history