nanobench: lazily decode bitmaps in .skps.
This cuts down on tool overhead when running something like recording only,
$ out/Release/nanobench --match skp --config nonrendering
which doesn't usually ever need to decode the images.
The actual measurements for recording don't change, as the decode is not in the timed section. It just skips irrelevant code, removing it from the profile and making the tool run faster.
This does, however, make a significant difference for playback speed. Most skps draw faster with this patch, some slower. I don't really have a good intuition for what's going on here. There is a fixed clip acting as a viewport, so there are probably lots of images that don't ever need to be decoded. Ideas? Is this perhaps because we're now blitting from smaller, partially decoded source images?
~/skia (clean) $ compare clean.log lazy-decode-bitmaps.log
tabl_slashdot.skp_1 2.76ms -> 4.33ms 1.57x
tabl_slashdot.skp_1_mpd 2.79ms -> 4.07ms 1.46x
tabl_sahadan.skp_1 3.41ms -> 4.87ms 1.43x
tabl_googleblog.skp_1 1.52ms -> 2.05ms 1.35x
tabl_techmeme.skp_1_mpd 1.14ms -> 1.51ms 1.32x
tabl_transformice.skp_1 2.61ms -> 3.43ms 1.31x
tabl_sahadan.skp_1_mpd 3.54ms -> 4.48ms 1.26x
tabl_techmeme.skp_1 1.01ms -> 1.27ms 1.26x
tabl_nytimes.skp_1_mpd 1ms -> 1.23ms 1.23x
tabl_worldjournal.skp_1_mpd 1.98ms -> 2.43ms 1.23x
tabl_pravda.skp_1_mpd 2.05ms -> 2.51ms 1.22x
tabl_transformice.skp_1_mpd 2.75ms -> 3.19ms 1.16x
tabl_nytimes.skp_1 874us -> 1.01ms 1.15x
tabl_pravda.skp_1 1.83ms -> 1.99ms 1.09x
tabl_worldjournal.skp_1 1.76ms -> 1.91ms 1.09x
desk_wowwiki.skp_1_mpd 3.7ms -> 3.9ms 1.05x
tabl_digg.skp_1 3.99ms -> 4.16ms 1.04x
tabl_ukwsj.skp_1_mpd 3ms -> 3.12ms 1.04x
desk_booking.skp_1 3.74ms -> 3.81ms 1.02x
desk_googlespreadsheetdashed.skp_1 10.6ms -> 10.6ms 1x
tabl_ukwsj.skp_1 2.88ms -> 2.89ms 1x
desk_googlespreadsheetdashed.skp_1_mpd 11.8ms -> 11.8ms 1x
desk_jsfiddlehumperclip.skp_1_mpd 891us -> 888us 1x
desk_googlespreadsheet.skp_1 4.65ms -> 4.62ms 0.99x
tabl_gspro.skp_1_mpd 1.97ms -> 1.94ms 0.99x
desk_booking.skp_1_mpd 4.1ms -> 4ms 0.98x
desk_carsvg.skp_1 18.2ms -> 17.7ms 0.97x
desk_gmailthread.skp_1_mpd 2.81ms -> 2.73ms 0.97x
desk_tigersvg.skp_1_mpd 19.5ms -> 18.9ms 0.97x
desk_mapsvg.skp_1 88.4ms -> 85.6ms 0.97x
tabl_cnet.skp_1_mpd 1.43ms -> 1.38ms 0.97x
desk_jsfiddlebigcar.skp_1 1.26ms -> 1.22ms 0.96x
desk_gws.skp_1 1.87ms -> 1.8ms 0.96x
desk_linkedin.skp_1 2.07ms -> 1.98ms 0.96x
tabl_deviantart.skp_1_mpd 118ms -> 113ms 0.96x
tabl_cnet.skp_1 1.2ms -> 1.14ms 0.95x
tabl_androidpolice.skp_1_mpd 5.95ms -> 5.63ms 0.95x
desk_sfgate.skp_1 1.75ms -> 1.64ms 0.94x
desk_twitter.skp_1 74ms -> 69.6ms 0.94x
desk_youtube.skp_1_mpd 3.17ms -> 2.96ms 0.93x
desk_gmailthread.skp_1 2.73ms -> 2.54ms 0.93x
desk_silkfinance.skp_1_mpd 1.71ms -> 1.59ms 0.93x
desk_jsfiddlebigcar.skp_1_mpd 1.45ms -> 1.35ms 0.93x
desk_pokemonwiki.skp_1_mpd 2.72ms -> 2.51ms 0.92x
desk_gws.skp_1_mpd 2.14ms -> 1.98ms 0.92x
desk_googlehome.skp_1 563us -> 517us 0.92x
desk_espn.skp_1 4.24ms -> 3.89ms 0.92x
tabl_culturalsolutions.skp_1 12.7ms -> 11.6ms 0.91x
desk_sfgate.skp_1_mpd 1.91ms -> 1.74ms 0.91x
tabl_hsfi.skp_1 1.06ms -> 966us 0.91x
desk_samoasvg.skp_1_mpd 10.5ms -> 9.47ms 0.91x
desk_facebook.skp_1_mpd 3.8ms -> 3.43ms 0.9x
desk_youtube.skp_1 3.52ms -> 3.14ms 0.89x
desk_ebay.skp_1_mpd 2.95ms -> 2.62ms 0.89x
desk_samoasvg.skp_1 10.9ms -> 9.66ms 0.89x
desk_googlespreadsheet.skp_1_mpd 5.59ms -> 4.94ms 0.88x
desk_mapsvg.skp_1_mpd 100ms -> 87.9ms 0.88x
desk_espn.skp_1_mpd 4.7ms -> 4.12ms 0.88x
desk_wordpress.skp_1_mpd 1.92ms -> 1.68ms 0.87x
tabl_deviantart.skp_1 140ms -> 122ms 0.87x
tabl_cuteoverload.skp_1_mpd 4.41ms -> 3.83ms 0.87x
desk_tigersvg.skp_1 19.6ms -> 17ms 0.87x
tabl_googlecalendar.skp_1 4.01ms -> 3.44ms 0.86x
desk_blogger.skp_1 2.49ms -> 2.14ms 0.86x
desk_chalkboard.skp_1_mpd 52.7ms -> 45ms 0.85x
desk_weather.skp_1 2.88ms -> 2.46ms 0.85x
desk_chalkboard.skp_1 51ms -> 43.4ms 0.85x
desk_yahooanswers.skp_1 2.74ms -> 2.32ms 0.85x
desk_forecastio.skp_1_mpd 1.26ms -> 1.07ms 0.85x
tabl_androidpolice.skp_1 5.18ms -> 4.34ms 0.84x
desk_yahooanswers.skp_1_mpd 3.44ms -> 2.85ms 0.83x
tabl_cnn.skp_1_mpd 2.59ms -> 2.15ms 0.83x
desk_pinterest.skp_1 2.69ms -> 2.22ms 0.83x
tabl_hsfi.skp_1_mpd 1.6ms -> 1.32ms 0.82x
tabl_culturalsolutions.skp_1_mpd 13.8ms -> 11.3ms 0.82x
desk_twitter.skp_1_mpd 76.6ms -> 63ms 0.82x
desk_ebay.skp_1 3.11ms -> 2.51ms 0.81x
tabl_mlb.skp_1_mpd 3.17ms -> 2.53ms 0.8x
tabl_mozilla.skp_1 2.42ms -> 1.91ms 0.79x
desk_pokemonwiki.skp_1 2.84ms -> 2.22ms 0.78x
desk_carsvg.skp_1_mpd 23.3ms -> 17.8ms 0.77x
desk_wowwiki.skp_1 4.21ms -> 3.21ms 0.76x
desk_amazon.skp_1 963us -> 728us 0.76x
desk_css3gradients.skp_1 2.58ms -> 1.92ms 0.74x
tabl_cuteoverload.skp_1 4.55ms -> 3.38ms 0.74x
tabl_cnn.skp_1 3.13ms -> 2.29ms 0.73x
tabl_googleblog.skp_1_mpd 2.32ms -> 1.7ms 0.73x
desk_mobilenews.skp_1 3.65ms -> 2.61ms 0.71x
desk_googleplus.skp_1 3.76ms -> 2.66ms 0.71x
tabl_mozilla.skp_1_mpd 2.88ms -> 2.03ms 0.71x
desk_pinterest.skp_1_mpd 3.17ms -> 2.21ms 0.7x
desk_css3gradients.skp_1_mpd 2.98ms -> 2.07ms 0.69x
desk_silkfinance.skp_1 2.06ms -> 1.42ms 0.69x
desk_facebook.skp_1 4.5ms -> 3.07ms 0.68x
desk_mobilenews.skp_1_mpd 4.05ms -> 2.73ms 0.68x
desk_baidu.skp_1_mpd 2.73ms -> 1.81ms 0.66x
desk_weather.skp_1_mpd 3.93ms -> 2.5ms 0.64x
desk_wordpress.skp_1 2.15ms -> 1.36ms 0.63x
desk_googlehome.skp_1_mpd 1.02ms -> 605us 0.59x
desk_fontwipe.skp_1 722us -> 402us 0.56x
desk_fontwipe.skp_1_mpd 897us -> 486us 0.54x
desk_baidu.skp_1 3.02ms -> 1.6ms 0.53x
desk_forecastio.skp_1 2.01ms -> 999us 0.5x
desk_amazon.skp_1_mpd 1.77ms -> 860us 0.49x
BUG=skia:
Review URL: https://codereview.chromium.org/743613005
2 files changed