darktable -d perf
    15.5963 [dt_dev_load_raw] loading the image. took 0.170 secs (0.103 CPU)
    15.9840 [histogram] took 0.001 secs (0.001 CPU) scope draw
    16.0235 [dt_dev_process_image_job] loading image. took 0.000 secs (0.000 CPU)
    16.0621 [histogram] took 0.000 secs (0.000 CPU) scope draw
    16.0626 [dev_pixelpipe] took 0.000 secs (0.000 CPU) initing base buffer [full]
    16.0784 [dev_pixelpipe] took 0.016 secs (0.025 CPU) [full] processed `rawprepare' on GPU, blended on GPU
    16.0826 [dev_pixelpipe] took 0.004 secs (0.008 CPU) [full] processed `temperature' on GPU, blended on GPU
    16.0843 [histogram] took 0.001 secs (0.001 CPU) scope draw
    16.0936 [dev_pixelpipe] took 0.011 secs (0.013 CPU) [full] processed `highlights' on GPU, blended on GPU
    16.1222 [histogram] took 0.000 secs (0.001 CPU) scope draw
    16.1312 [histogram] took 0.000 secs (0.000 CPU) scope draw
    16.1418 [histogram] took 0.001 secs (0.001 CPU) scope draw
    16.1520 [histogram] took 0.001 secs (0.000 CPU) scope draw
    16.1649 [histogram] took 0.000 secs (0.000 CPU) scope draw
    16.1741 [resample_cl] plan 0.001 secs (0.000 CPU) resample 0.030 secs (0.039 CPU)
    16.1766 [dev_pixelpipe] took 0.083 secs (0.099 CPU) [full] processed `demosaic' on GPU, blended on GPU
    16.1819 [histogram] took 0.000 secs (0.000 CPU) scope draw
    16.1955 [histogram] took 0.000 secs (0.001 CPU) scope draw
    16.2003 [dev_pixelpipe] took 0.024 secs (0.015 CPU) [full] processed `denoiseprofile' on GPU, blended on GPU
    16.2277 [dev_pixelpipe] took 0.027 secs (0.050 CPU) [full] processed `lens' on GPU, blended on GPU
    16.2290 [dev_pixelpipe] took 0.001 secs (0.001 CPU) [full] processed `exposure' on GPU, blended on GPU
    16.5573 [histogram] took 0.000 secs (0.001 CPU) scope draw
    16.5653 [histogram] took 0.000 secs (0.001 CPU) scope draw
    16.9820 [dev_pixelpipe] took 0.753 secs (3.038 CPU) [full] processed `exposure.1' on GPU, blended on GPU
    16.9996 [dev_pixelpipe] took 0.018 secs (0.041 CPU) [full] processed `toneequal' on CPU, blended on CPU
    17.0059 [dev_pixelpipe] took 0.006 secs (0.006 CPU) [full] processed `colorin' on GPU, blended on GPU
    17.0075 [dt_ioppr_transform_image_colorspace_cl] IOP_CS_LAB-->IOP_CS_RGB took 0.001 secs (0.001 GPU) [channelmixerrgb]
    17.0093 [dev_pixelpipe] took 0.003 secs (0.003 CPU) [full] processed `channelmixerrgb' on GPU, blended on GPU
    17.2277 [dev_pixelpipe] took 0.218 secs (0.211 CPU) [full] processed `diffuse' on GPU, blended on GPU
    17.5003 [dev_pixelpipe] took 0.273 secs (0.267 CPU) [full] processed `diffuse.1' on GPU, blended on GPU
    17.5109 [dev_pixelpipe] took 0.010 secs (0.006 CPU) [full] processed `diffuse.2' on GPU, blended on GPU
    17.5215 [dev_pixelpipe] took 0.011 secs (0.006 CPU) [full] processed `colorbalancergb' on GPU, blended on GPU
    17.5241 [dev_pixelpipe] took 0.003 secs (0.000 CPU) [full] processed `filmicrgb' on GPU, blended on GPU
    17.5255 [dt_ioppr_transform_image_colorspace_cl] IOP_CS_RGB-->IOP_CS_LAB took 0.001 secs (0.000 GPU) [colorout]
    17.5363 [dev_pixelpipe] took 0.012 secs (0.002 CPU) [full] processed `colorout' on GPU, blended on GPU
    17.5476 [dev_pixelpipe] took 0.011 secs (0.027 CPU) [full] processed `gamma' on CPU, blended on CPU
    17.5492 [dev_process_image] pixel pipeline took 1.487 secs (3.822 CPU) processing `_DSC9187.NEF'
    17.5525 [histogram] took 0.000 secs (0.000 CPU) scope draw
    17.6098 [histogram] took 0.000 secs (0.000 CPU) scope draw
    17.6547 [dev_pixelpipe] took 0.000 secs (0.000 CPU) initing base buffer [preview]
    17.6562 [dev_pixelpipe] took 0.001 secs (0.001 CPU) [preview] processed `rawprepare' on GPU, blended on GPU
    17.6568 [dev_pixelpipe] took 0.001 secs (0.000 CPU) [preview] processed `temperature' on GPU, blended on GPU
    17.6575 [dev_pixelpipe] took 0.001 secs (0.000 CPU) [preview] processed `highlights' on GPU, blended on GPU
    17.6613 [dev_pixelpipe] took 0.004 secs (0.004 CPU) [preview] processed `demosaic' on GPU, blended on GPU
    17.6717 [dev_pixelpipe] took 0.010 secs (0.000 CPU) [preview] processed `denoiseprofile' on GPU, blended on GPU
    17.6908 [dev_pixelpipe] took 0.019 secs (0.038 CPU) [preview] processed `lens' on GPU, blended on GPU
    17.6916 [dev_pixelpipe] took 0.001 secs (0.000 CPU) [preview] processed `exposure' on GPU, blended on GPU
    17.9772 [dev_pixelpipe] took 0.286 secs (1.092 CPU) [preview] processed `exposure.1' on GPU, blended on GPU
    17.9955 [dev_pixelpipe] took 0.018 secs (0.047 CPU) [preview] processed `toneequal' on CPU, blended on CPU
    18.0015 [dev_pixelpipe] took 0.006 secs (0.006 CPU) [preview] processed `colorin' on GPU, blended on GPU
    18.0031 [dt_ioppr_transform_image_colorspace_cl] IOP_CS_LAB-->IOP_CS_RGB took 0.001 secs (0.000 GPU) [channelmixerrgb]
    18.0047 [dev_pixelpipe] took 0.003 secs (0.000 CPU) [preview] processed `channelmixerrgb' on GPU, blended on GPU
    18.1502 [histogram] took 0.000 secs (0.004 CPU) scope draw
    18.2039 [dev_pixelpipe] took 0.199 secs (0.198 CPU) [preview] processed `diffuse' on GPU, blended on GPU
    18.4601 [dev_pixelpipe] took 0.256 secs (0.250 CPU) [preview] processed `diffuse.1' on GPU, blended on GPU
    18.4703 [dev_pixelpipe] took 0.010 secs (0.006 CPU) [preview] processed `diffuse.2' on GPU, blended on GPU
    18.4803 [dev_pixelpipe] took 0.010 secs (0.002 CPU) [preview] processed `colorbalancergb' on GPU, blended on GPU
    18.4828 [dev_pixelpipe] took 0.002 secs (0.002 CPU) [preview] processed `filmicrgb' on GPU, blended on GPU
    18.4840 [dt_ioppr_transform_image_colorspace_cl] IOP_CS_RGB-->IOP_CS_LAB took 0.001 secs (0.001 GPU) [colorout]
    18.4945 [dev_pixelpipe] took 0.012 secs (0.008 CPU) [preview] processed `colorout' on GPU, blended on GPU
    18.5055 [dev_pixelpipe] took 0.011 secs (0.022 CPU) [preview] processed `gamma' on CPU, blended on CPU
    18.5128 [dt_ioppr_transform_image_colorspace_rgb] RGB-->RGB took 0.007 secs (0.049 CPU) [final histogram]
    18.5834 [histogram] took 0.078 secs (0.137 CPU) final waveform
    18.5849 [dev_process_preview] pixel pipeline processing took 0.961 secs (1.861 CPU)
    18.5999 [histogram] took 0.003 secs (0.004 CPU) scope draw
    21.9714 [histogram] took 0.004 secs (0.004 CPU) scope draw
    22.0734 [histogram] took 0.006 secs (0.006 CPU) scope draw
    22.1239 [dt_dev_process_image_job] loading image. took 0.000 secs (0.000 CPU)
    22.1247 [dev_pixelpipe] took 0.000 secs (0.000 CPU) initing base buffer [full]
    22.1425 [dev_pixelpipe] took 0.018 secs (0.032 CPU) [full] processed `rawprepare' on GPU, blended on GPU
    22.1465 [dev_pixelpipe] took 0.004 secs (0.008 CPU) [full] processed `temperature' on GPU, blended on GPU
    22.1507 [dev_pixelpipe] took 0.004 secs (0.008 CPU) [full] processed `highlights' on GPU, blended on GPU
    22.2312 [resample_cl] plan 0.000 secs (0.000 CPU) resample 0.032 secs (0.064 CPU)
    22.2326 [dev_pixelpipe] took 0.082 secs (0.137 CPU) [full] processed `demosaic' on GPU, blended on GPU
    22.2658 [dev_pixelpipe] took 0.033 secs (0.041 CPU) [full] processed `denoiseprofile' on GPU, blended on GPU
    22.3114 [histogram] took 0.005 secs (0.009 CPU) scope draw
    22.3308 [dev_pixelpipe] took 0.065 secs (0.151 CPU) [full] processed `lens' on GPU, blended on GPU
    22.3325 [dev_pixelpipe] took 0.002 secs (0.001 CPU) [full] processed `exposure' on GPU, blended on GPU
    22.3729 [histogram] took 0.006 secs (0.011 CPU) scope draw
    22.4107 [histogram] took 0.006 secs (0.027 CPU) scope draw
    23.2875 [dev_pixelpipe] took 0.955 secs (4.038 CPU) [full] processed `exposure.1' on GPU, blended on GPU
    23.3263 [dev_pixelpipe] took 0.039 secs (0.105 CPU) [full] processed `toneequal' on CPU, blended on CPU
    23.3375 [dev_pixelpipe] took 0.011 secs (0.011 CPU) [full] processed `colorin' on GPU, blended on GPU
    23.3393 [dt_ioppr_transform_image_colorspace_cl] IOP_CS_LAB-->IOP_CS_RGB took 0.001 secs (0.000 GPU) [channelmixerrgb]
    23.3421 [dev_pixelpipe] took 0.005 secs (0.000 CPU) [full] processed `channelmixerrgb' on GPU, blended on GPU
    23.7616 [dev_pixelpipe] took 0.419 secs (0.411 CPU) [full] processed `diffuse' on GPU, blended on GPU
    24.3344 [dev_pixelpipe] took 0.573 secs (0.562 CPU) [full] processed `diffuse.1' on GPU, blended on GPU
    24.3614 [dev_pixelpipe] took 0.027 secs (0.014 CPU) [full] processed `diffuse.2' on GPU, blended on GPU
    24.3841 [dev_pixelpipe] took 0.023 secs (0.011 CPU) [full] processed `colorbalancergb' on GPU, blended on GPU
    24.3876 [dev_pixelpipe] took 0.003 secs (0.000 CPU) [full] processed `filmicrgb' on GPU, blended on GPU
    24.3894 [dt_ioppr_transform_image_colorspace_cl] IOP_CS_RGB-->IOP_CS_LAB took 0.001 secs (0.000 GPU) [colorout]
    24.4130 [dev_pixelpipe] took 0.025 secs (0.012 CPU) [full] processed `colorout' on GPU, blended on GPU
    24.4379 [dev_pixelpipe] took 0.025 secs (0.055 CPU) [full] processed `gamma' on CPU, blended on CPU
    24.4414 [dev_process_image] pixel pipeline took 2.317 secs (5.598 CPU) processing `_DSC9187.NEF'
    24.4482 [histogram] took 0.004 secs (0.004 CPU) scope draw
    24.7417 [histogram] took 0.014 secs (0.014 CPU) scope draw
    24.7572 [histogram] took 0.007 secs (0.007 CPU) scope draw
    24.7653 [histogram] took 0.005 secs (0.005 CPU) scope draw