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Created by Shakhboz Zabirov@kuvalda
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P3231 (3.16) Забиров

eto konec...

test hardware:

```                        `        sXXXXXX@helios
  ` `.....---.......--.```   -/     --------------
  +o   .--`         /y:`      +.    OS: FreeBSD 14.1 amd64
   yo`:.            :o      `+-     Host: X9DR3-F (1234567890)
    y/               -/`   -o/      Kernel: FreeBSD 14.1-STABLE
   .-                  ::/sy+:.     Uptime: 8 days, 5 hours, 55 mins
   /                     `--  /     Packages: 199 (pkg)
  `:                          :`    Shell: bash 5.2.32
  `:                          :`    Terminal: X
   /                          /     CPU: Intel(R) Xeon(R) E5-2643 0 (16) @ 3.30 GHz
   .-                        -.     GPU: Unknown Device 0532 (VGA compatible)
    --                      -.      Memory: 39.94 GiB / 127.95 GiB (31%)
     `:`                  `:`       Swap: 0 B / 64.00 GiB (0%)
       .--             `--.
          .---.....----.

test results:

ns/op op/s err% total benchmark
88.45 11,306,373.20 0.1% 0.11 sepia (SSE)
164.15 6,091,832.33 0.1% 0.20 sepia (C)

for evaluation of the execution time of a proper program, please use profilers and related utilities (e. g. callgrind). i would also be glad to measure the performance of the entire application in bench.cc, but too much time has already been spent fighting optimization UB with inline assembler and C++. if you (the reviewer) come up with something portable and reliable, please let me know.

Edited by Shakhboz Zabirov