malloc_usable_size does not exist in UCLIBC, so fall back to just
returning 0 for SkVarAlloc::heap_size().
BUG=skia:
Review URL: https://codereview.chromium.org/1006073003
When we added the 64K allocation cap, the bots showed we took a perf hit
on some large .skps like desk_pokemonwiki.skp, despite not seeing a local
effect. I'm still not seeing that locally, but I'd like to try removing the cap on
the bots to see what happens. For big monolithic pictures, really packing into
memory tightly is probably not as important as it is for tiny ones.
Similarly, we're probably being too cautious about making tiny allocations.
Today we start at 16 bytes, which isn't really enough to record anything.
Even the smallest picture, say,
save
clipRect
drawRect
restore
requires ~200 bytes, so we might as well move our minimum block size up
near there.
I don't know if 16 bytes is too small to start for GrTextStrikes, so I've left the
behavior the same (though the max is still gone).
Local recording performance is neutral-to-positive:
tabl_deviantart.skp 126us -> 129us 1.02x
tabl_nytimes.skp 110us -> 112us 1.02x
tabl_cuteoverload.skp 521us -> 530us 1.02x
desk_mobilenews.skp 673us -> 682us 1.01x
desk_chalkboard.skp 843us -> 854us 1.01x
desk_sfgate.skp 528us -> 535us 1.01x
desk_silkfinance.skp 68.2us -> 69us 1.01x
desk_youtube.skp 623us -> 629us 1.01x
desk_blogger.skp 472us -> 475us 1.01x
desk_jsfiddlehumperclip.skp 42.2us -> 42.5us 1.01x
desk_espn.skp 255us -> 256us 1.01x
desk_ebay.skp 174us -> 174us 1x
desk_twitter.skp 454us -> 455us 1x
tabl_pravda.skp 200us -> 201us 1x
desk_wordpress.skp 782us -> 784us 1x
desk_samoasvg.skp 762us -> 761us 1x
tabl_mozilla.skp 1.58ms -> 1.58ms 1x
tabl_slashdot.skp 107us -> 107us 1x
tabl_techmeme.skp 102us -> 102us 0.99x
tabl_gamedeksiam.skp 729us -> 724us 0.99x
tabl_nofolo.skp 65.3us -> 64.7us 0.99x
desk_gmailthread.skp 339us -> 336us 0.99x
tabl_sahadan.skp 91us -> 90us 0.99x
desk_yahooanswers.skp 144us -> 142us 0.99x
tabl_cnet.skp 143us -> 141us 0.99x
tabl_googleblog.skp 206us -> 203us 0.99x
tabl_cnn.skp 160us -> 158us 0.99x
tabl_frantzen.skp 50.5us -> 49.6us 0.98x
desk_linkedin.skp 328us -> 323us 0.98x
tabl_digg.skp 790us -> 769us 0.97x
desk_jsfiddlebigcar.skp 40.6us -> 39.5us 0.97x
desk_mapsvg.skp 1.57ms -> 1.52ms 0.97x
tabl_gmail.skp 19.4us -> 18.6us 0.96x
tabl_hsfi.skp 9.81us -> 9.11us 0.93x
BUG=skia:
Review URL: https://codereview.chromium.org/793033002
