VC5Decompressor: do final combining in parallel too
VC5Decompressor: do final combining in parallel too

$ ~/rawspeed/build-Clang-Release/googlebenchmark/googlebenchmark-src/tools/compare.py -a benchmarks ~/rawspeed/build-Clang-Release/src/utilities/rsbench/rsbench{-prev,} --benchmark_display_aggregates_only=true --benchmark_counters_tabular=true --benchmark_repetitions=100 GOPR9172.GPR
RUNNING: /home/lebedevri/rawspeed/build-Clang-Release/src/utilities/rsbench/rsbench-prev --benchmark_display_aggregates_only=true --benchmark_counters_tabular=true --benchmark_repetitions=100 GOPR9172.GPR --benchmark_display_aggregates_only=true --benchmark_out=/tmp/tmpmYrirC
2018-10-19 20:10:44
Running /home/lebedevri/rawspeed/build-Clang-Release/src/utilities/rsbench/rsbench-prev
Run on (8 X 4000 MHz CPU s)
CPU Caches:
  L1 Data 16K (x8)
  L1 Instruction 64K (x4)
  L2 Unified 2048K (x4)
  L3 Unified 8192K (x1)
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Benchmark                                        Time           CPU Iterations  CPUTime,s CPUTime/WallTime     Pixels Pixels/CPUTime Pixels/WallTime Raws/CPUTime Raws/WallTime WallTime,s
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
GOPR9172.GPR/threads:8/real_time_mean          167 ms         84 ms          5    1.29641          7.75201        12M       9.26396M        71.8139M     0.771997       5.98449   0.167237
GOPR9172.GPR/threads:8/real_time_median        167 ms         84 ms          5     1.2927          7.75825        12M       9.28292M        71.9202M     0.773577       5.99335   0.166852
GOPR9172.GPR/threads:8/real_time_stddev          5 ms          4 ms          5  0.0376259        0.0276942          0       265.583k        2.05799M    0.0221319      0.171499   4.86784m
RUNNING: /home/lebedevri/rawspeed/build-Clang-Release/src/utilities/rsbench/rsbench --benchmark_display_aggregates_only=true --benchmark_counters_tabular=true --benchmark_repetitions=100 GOPR9172.GPR --benchmark_display_aggregates_only=true --benchmark_out=/tmp/tmpZ3oEIN
2018-10-19 20:12:08
Running /home/lebedevri/rawspeed/build-Clang-Release/src/utilities/rsbench/rsbench
Run on (8 X 4000 MHz CPU s)
CPU Caches:
  L1 Data 16K (x8)
  L1 Instruction 64K (x4)
  L2 Unified 2048K (x4)
  L3 Unified 8192K (x1)
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Benchmark                                        Time           CPU Iterations  CPUTime,s CPUTime/WallTime     Pixels Pixels/CPUTime Pixels/WallTime Raws/CPUTime Raws/WallTime WallTime,s
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
GOPR9172.GPR/threads:8/real_time_mean          137 ms         54 ms          7     1.0542          7.70626        12M       11.3863M        87.7449M     0.948857       7.31207   0.136797
GOPR9172.GPR/threads:8/real_time_median        136 ms         54 ms          7    1.05029          7.70995        12M       11.4254M         87.987M     0.952118       7.33225   0.136384
GOPR9172.GPR/threads:8/real_time_stddev          2 ms          1 ms          7  0.0180728        0.0166384          0       192.464k         1.4459M    0.0160387      0.120492   2.28779m
Comparing /home/lebedevri/rawspeed/build-Clang-Release/src/utilities/rsbench/rsbench-prev to /home/lebedevri/rawspeed/build-Clang-Release/src/utilities/rsbench/rsbench
Benchmark                                                 Time             CPU      Time Old      Time New       CPU Old       CPU New
--------------------------------------------------------------------------------------------------------------------------------------
GOPR9172.GPR/threads:8/real_time_pvalue                 0.0000          0.0000      U Test, Repetitions: 100 vs 100
GOPR9172.GPR/threads:8/real_time_mean                  -0.1820         -0.3593           167           137            84            54
GOPR9172.GPR/threads:8/real_time_median                -0.1826         -0.3587           167           136            84            54
GOPR9172.GPR/threads:8/real_time_stddev                -0.5300         -0.7577             5             2             4             1

darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,LebedevRI/rawspeed,darktable-org/rawspeed,darktable-org/rawspeed