Batched implementation of drawLattice() for GPU

Batched implementation of drawLattice() for GPU

Bechmarks (Nexus 6P):

Src=100x100, Dst=250x250, NumRects=9
Android              77.7us
Skia (without patch) 57.2us
Skia (with patch)    30.9us

Src=100x100, Dst=500x500, NumRects=9
Android              77.0us
Skia (without patch) 56.9us
Skia (with patch)    31.8us

Src=100x100, Dst=1000x1000, NumRects=9
Android              180us
Skia (without patch) 96.8us
Skia (with patch)    70.5us

Src=100x100, Dst=250x250, NumRects=15
Android              208us
Skia (without patch) 155us
Skia (with patch)    38.2us

Src=100x100, Dst=500x500, NumRects=15
Android              207us
Skia (without patch) 152us
Skia (with patch)    38.4us

Src=100x100, Dst=1000x1000, NumRects=15
Android              233us
Skia (without patch) 156us
Skia (with patch)    99.9us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002

Committed: https://skia.googlesource.com/skia/+/93242c4ae50dfcc0d922cdb3ba80bbc7b4bbe93d
Committed: https://skia.googlesource.com/skia/+/10e3d9bf59bdec92c05367ae0b71e1ce1ee4a690

[msarett, 2016-08-17 22:24:09]

Description was changed from

==========
WIP: Batched implementation of drawLattice() for GPU

BUG=skia:
==========

to

==========
WIP: Batched implementation of drawLattice() for GPU

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

[msarett, 2016-08-17 22:33:03]

Description was changed from

==========
WIP: Batched implementation of drawLattice() for GPU

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

to

==========
WIP: Batched implementation of drawLattice() for GPU

Nexus 6P Bench Times:
Android              212us
Skia (without patch) 122us
Skia (with patch)    110us

HP z620 Bench Times:
Android              25.2us
Skia (without patch) 28.0us
Skia (with patch)    33.1us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

[msarett, 2016-08-18 14:57:37]

Patchset #2 (id:20001) has been deleted

[msarett, 2016-08-18 15:00:09]

Description was changed from

==========
WIP: Batched implementation of drawLattice() for GPU

Nexus 6P Bench Times:
Android              212us
Skia (without patch) 122us
Skia (with patch)    110us

HP z620 Bench Times:
Android              25.2us
Skia (without patch) 28.0us
Skia (with patch)    33.1us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

to

==========
WIP: Batched implementation of drawLattice() for GPU

Nexus 6P Bench Times: Small Large
Android               212us 12.9ms
Skia (without patch)  175us 9.44ms
Skia (with patch)     119us 4.47ms

HP z620 Bench Times:  Small  Large
Android               27.6us 60.0us
Skia (without patch)  22.8us 53.2us
Skia (with patch)     38.5us 40.0us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

[msarett, 2016-08-18 15:07:30]

Patchset #4 (id:80001) has been deleted

[msarett, 2016-08-18 15:13:57]

Description was changed from

==========
WIP: Batched implementation of drawLattice() for GPU

Nexus 6P Bench Times: Small Large
Android               212us 12.9ms
Skia (without patch)  175us 9.44ms
Skia (with patch)     119us 4.47ms

HP z620 Bench Times:  Small  Large
Android               27.6us 60.0us
Skia (without patch)  22.8us 53.2us
Skia (with patch)     38.5us 40.0us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

to

==========
Batched implementation of drawLattice() for GPU

Nexus 6P Bench Times: Small Large
Android               212us 12.9ms
Skia (without patch)  175us 9.44ms
Skia (with patch)     119us 4.47ms

HP z620 Bench Times:  Small  Large
Android               27.6us 60.0us
Skia (without patch)  22.8us 53.2us
Skia (with patch)     38.5us 40.0us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

[msarett, 2016-08-18 15:14:31]

Description was changed from

==========
Batched implementation of drawLattice() for GPU

Nexus 6P Bench Times: Small Large
Android               212us 12.9ms
Skia (without patch)  175us 9.44ms
Skia (with patch)     119us 4.47ms

HP z620 Bench Times:  Small  Large
Android               27.6us 60.0us
Skia (without patch)  22.8us 53.2us
Skia (with patch)     38.5us 40.0us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

to

==========
Batched implementation of drawLattice() for GPU

Nexus 6P Bench Times: Small  Large
Android               212us  12.9ms
Skia (without patch)  175us  9.44ms
Skia (with patch)     119us  4.47ms

HP z620 Bench Times:  Small  Large
Android               27.6us 60.0us
Skia (without patch)  22.8us 53.2us
Skia (with patch)     38.5us 40.0us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

[msarett, 2016-08-18 15:16:07]

msarett@google.com changed reviewers:
+ bsalomon@google.com, djsollen@google.com, reed@google.com

[msarett, 2016-08-18 15:16:08]

Improves performance a bit for drawing Android's ninepatches.

https://codereview.chromium.org/2255963002/diff/100001/bench/DrawLatticeBench...
File bench/DrawLatticeBench.cpp (right):

https://codereview.chromium.org/2255963002/diff/100001/bench/DrawLatticeBench...
bench/DrawLatticeBench.cpp:45: void onDraw(int loops, SkCanvas* canvas) override
{
Brian, any thoughts on this bench?  I've had some issues with inconsistent
results.  In particular, the Nexus 6P seems to really hate the DrawLattice_Large
version.

https://codereview.chromium.org/2255963002/diff/100001/src/gpu/SkGpuDevice.cpp
File src/gpu/SkGpuDevice.cpp (right):

https://codereview.chromium.org/2255963002/diff/100001/src/gpu/SkGpuDevice.cp...
src/gpu/SkGpuDevice.cpp:1450: std::unique_ptr<SkLatticeIter> iter(
Another option is to convert the |center| rect to a SkCanvas::Lattice here. 
This issue I had is that the SkCanvas::Lattice does not own its pointers to
fXDivs and fYDivs.

So here we're stuck with no one to take ownership...

[bsalomon, 2016-08-18 15:40:26]

https://codereview.chromium.org/2255963002/diff/100001/bench/DrawLatticeBench...
File bench/DrawLatticeBench.cpp (right):

https://codereview.chromium.org/2255963002/diff/100001/bench/DrawLatticeBench...
bench/DrawLatticeBench.cpp:45: void onDraw(int loops, SkCanvas* canvas) override
{
On 2016/08/18 15:16:08, msarett wrote:
> Brian, any thoughts on this bench?  I've had some issues with inconsistent
> results.  In particular, the Nexus 6P seems to really hate the
DrawLattice_Large
> version.

Not really. I wonder if it has more to do with the size of the destination than
the size of the lattice.

https://codereview.chromium.org/2255963002/diff/100001/src/gpu/batches/GrNine...
File src/gpu/batches/GrNinePatch.cpp (right):

https://codereview.chromium.org/2255963002/diff/100001/src/gpu/batches/GrNine...
src/gpu/batches/GrNinePatch.cpp:110:
patch.fViewMatrix.mapPointsWithStride(positions, vertexStride, kVertsPerRect);
I wonder if we should lift this out of the loop, so we apply the view matrix to
all the points in a lattice at once.

https://codereview.chromium.org/2255963002/diff/100001/src/gpu/batches/GrNine...
src/gpu/batches/GrNinePatch.cpp:151:
fPatches.push_back(std::move(that->fPatches[i]));
Should we have a bulk mover? move_back_n(T*, int) That way the array would only
check for realloc once.

[msarett, 2016-08-18 17:49:20]

https://codereview.chromium.org/2255963002/diff/100001/src/gpu/batches/GrNine...
File src/gpu/batches/GrNinePatch.cpp (right):

https://codereview.chromium.org/2255963002/diff/100001/src/gpu/batches/GrNine...
src/gpu/batches/GrNinePatch.cpp:110:
patch.fViewMatrix.mapPointsWithStride(positions, vertexStride, kVertsPerRect);
On 2016/08/18 15:40:26, bsalomon wrote:
> I wonder if we should lift this out of the loop, so we apply the view matrix
to
> all the points in a lattice at once.

Good idea - I think this is a nice opt for the scale-translate case.  Otherwise,
I think we still need to apply to dstR.

https://codereview.chromium.org/2255963002/diff/100001/src/gpu/batches/GrNine...
src/gpu/batches/GrNinePatch.cpp:151:
fPatches.push_back(std::move(that->fPatches[i]));
On 2016/08/18 15:40:26, bsalomon wrote:
> Should we have a bulk mover? move_back_n(T*, int) That way the array would
only
> check for realloc once.

Yes!  I've added one.

[msarett, 2016-08-18 19:12:06]

Description was changed from

==========
Batched implementation of drawLattice() for GPU

Nexus 6P Bench Times: Small  Large
Android               212us  12.9ms
Skia (without patch)  175us  9.44ms
Skia (with patch)     119us  4.47ms

HP z620 Bench Times:  Small  Large
Android               27.6us 60.0us
Skia (without patch)  22.8us 53.2us
Skia (with patch)     38.5us 40.0us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

to

==========
Batched implementation of drawLattice() for GPU

Bechmarks (Nexus 6P):

Src=100x100, Dst=250x250, NumRects=9
Android              77.7us
Skia (without patch) 
Skia (with patch)    34.7us

Src=100x100, Dst=500x500, NumRects=9
Android              77.0us
Skia (without patch) 
Skia (with patch)    44.5us

Src=100x100, Dst=1000x1000, NumRects=9
Android              180us
Skia (without patch) 
Skia (with patch)    70.5us

Src=100x100, Dst=250x250, NumRects=15
Android              208us
Skia (without patch) 
Skia (with patch)    55.9us

Src=100x100, Dst=500x500, NumRects=15
Android              207us
Skia (without patch) 
Skia (with patch)    63.0us

Src=100x100, Dst=1000x1000, NumRects=15
Android              233us
Skia (without patch) 
Skia (with patch)    99.9us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

[msarett, 2016-08-18 19:15:23]

Description was changed from

==========
Batched implementation of drawLattice() for GPU

Bechmarks (Nexus 6P):

Src=100x100, Dst=250x250, NumRects=9
Android              77.7us
Skia (without patch) 
Skia (with patch)    34.7us

Src=100x100, Dst=500x500, NumRects=9
Android              77.0us
Skia (without patch) 
Skia (with patch)    44.5us

Src=100x100, Dst=1000x1000, NumRects=9
Android              180us
Skia (without patch) 
Skia (with patch)    70.5us

Src=100x100, Dst=250x250, NumRects=15
Android              208us
Skia (without patch) 
Skia (with patch)    55.9us

Src=100x100, Dst=500x500, NumRects=15
Android              207us
Skia (without patch) 
Skia (with patch)    63.0us

Src=100x100, Dst=1000x1000, NumRects=15
Android              233us
Skia (without patch) 
Skia (with patch)    99.9us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

to

==========
Batched implementation of drawLattice() for GPU

Bechmarks (Nexus 6P):

Src=100x100, Dst=250x250, NumRects=9
Android              77.7us
Skia (without patch) 57.2us
Skia (with patch)    34.7us

Src=100x100, Dst=500x500, NumRects=9
Android              77.0us
Skia (without patch) 56.9us
Skia (with patch)    44.5us

Src=100x100, Dst=1000x1000, NumRects=9
Android              180us
Skia (without patch) 96.8us
Skia (with patch)    70.5us

Src=100x100, Dst=250x250, NumRects=15
Android              208us
Skia (without patch) 155us
Skia (with patch)    55.9us

Src=100x100, Dst=500x500, NumRects=15
Android              207us
Skia (without patch) 152us
Skia (with patch)    63.0us

Src=100x100, Dst=1000x1000, NumRects=15
Android              233us
Skia (without patch) 156us
Skia (with patch)    99.9us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

[msarett, 2016-08-18 19:19:26]

I've moved all of the matrix computation out of the loop now.

And I've also improved the benchmark.  I gave up on measuring
on z620 since the results are so noisy that I can't make any
conclusions.  But the latest results are good on 6P!  And
they actually seem to make logical sense!

[bsalomon, 2016-08-18 19:26:37]

lgtm, numbers look nice!

[msarett, 2016-08-18 19:34:02]

The CQ bit was checked by msarett@google.com to run a CQ dry run

[commit-bot: I haz the power, 2016-08-18 19:34:09]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-18 19:37:59]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-08-18 19:38:00]

Dry run: Try jobs failed on following builders:
  Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Debug-GN-Trybot on master.client.skia
(JOB_FAILED,
http://build.chromium.org/p/client.skia/builders/Test-Ubuntu-GCC-GCE-CPU-AVX2...)
  Test-Ubuntu-GCC-GCE-CPU-AVX2-x86_64-Release-Shared-Trybot on
master.client.skia (JOB_FAILED,
http://build.chromium.org/p/client.skia/builders/Test-Ubuntu-GCC-GCE-CPU-AVX2...)
  Build-Ubuntu-Clang-x86_64-Debug-GN-Trybot on master.client.skia.compile
(JOB_FAILED,
http://build.chromium.org/p/client.skia.compile/builders/Build-Ubuntu-Clang-x...)

[msarett, 2016-08-18 19:48:28]

Patchset #7 (id:160001) has been deleted

[msarett, 2016-08-18 19:48:36]

The CQ bit was checked by msarett@google.com to run a CQ dry run

[commit-bot: I haz the power, 2016-08-18 19:48:39]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-18 20:10:32]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-08-18 20:10:33]

Dry run: This issue passed the CQ dry run.

[msarett, 2016-08-18 20:10:49]

The CQ bit was checked by msarett@google.com

[msarett, 2016-08-18 20:10:50]

The patchset sent to the CQ was uploaded after l-g-t-m from bsalomon@google.com
Link to the patchset: https://codereview.chromium.org/2255963002/#ps180001
(title: "Rebase")

[commit-bot: I haz the power, 2016-08-18 20:10:53]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-18 20:11:51]

Description was changed from

==========
Batched implementation of drawLattice() for GPU

Bechmarks (Nexus 6P):

Src=100x100, Dst=250x250, NumRects=9
Android              77.7us
Skia (without patch) 57.2us
Skia (with patch)    34.7us

Src=100x100, Dst=500x500, NumRects=9
Android              77.0us
Skia (without patch) 56.9us
Skia (with patch)    44.5us

Src=100x100, Dst=1000x1000, NumRects=9
Android              180us
Skia (without patch) 96.8us
Skia (with patch)    70.5us

Src=100x100, Dst=250x250, NumRects=15
Android              208us
Skia (without patch) 155us
Skia (with patch)    55.9us

Src=100x100, Dst=500x500, NumRects=15
Android              207us
Skia (without patch) 152us
Skia (with patch)    63.0us

Src=100x100, Dst=1000x1000, NumRects=15
Android              233us
Skia (without patch) 156us
Skia (with patch)    99.9us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002
==========

to

==========
Batched implementation of drawLattice() for GPU

Bechmarks (Nexus 6P):

Src=100x100, Dst=250x250, NumRects=9
Android              77.7us
Skia (without patch) 57.2us
Skia (with patch)    34.7us

Src=100x100, Dst=500x500, NumRects=9
Android              77.0us
Skia (without patch) 56.9us
Skia (with patch)    44.5us

Src=100x100, Dst=1000x1000, NumRects=9
Android              180us
Skia (without patch) 96.8us
Skia (with patch)    70.5us

Src=100x100, Dst=250x250, NumRects=15
Android              208us
Skia (without patch) 155us
Skia (with patch)    55.9us

Src=100x100, Dst=500x500, NumRects=15
Android              207us
Skia (without patch) 152us
Skia (with patch)    63.0us

Src=100x100, Dst=1000x1000, NumRects=15
Android              233us
Skia (without patch) 156us
Skia (with patch)    99.9us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002

Committed:
https://skia.googlesource.com/skia/+/93242c4ae50dfcc0d922cdb3ba80bbc7b4bbe93d
==========

[commit-bot: I haz the power, 2016-08-18 20:11:52]

Committed patchset #7 (id:180001) as
https://skia.googlesource.com/skia/+/93242c4ae50dfcc0d922cdb3ba80bbc7b4bbe93d

[msarett, 2016-08-18 21:29:14]

A revert of this CL (patchset #7 id:180001) has been created in
https://codereview.chromium.org/2255683004/ by msarett@google.com.

The reason for reverting is: Things drawing weird..

[msarett, 2016-08-18 21:38:48]

Description was changed from

==========
Batched implementation of drawLattice() for GPU

Bechmarks (Nexus 6P):

Src=100x100, Dst=250x250, NumRects=9
Android              77.7us
Skia (without patch) 57.2us
Skia (with patch)    34.7us

Src=100x100, Dst=500x500, NumRects=9
Android              77.0us
Skia (without patch) 56.9us
Skia (with patch)    44.5us

Src=100x100, Dst=1000x1000, NumRects=9
Android              180us
Skia (without patch) 96.8us
Skia (with patch)    70.5us

Src=100x100, Dst=250x250, NumRects=15
Android              208us
Skia (without patch) 155us
Skia (with patch)    55.9us

Src=100x100, Dst=500x500, NumRects=15
Android              207us
Skia (without patch) 152us
Skia (with patch)    63.0us

Src=100x100, Dst=1000x1000, NumRects=15
Android              233us
Skia (without patch) 156us
Skia (with patch)    99.9us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002

Committed:
https://skia.googlesource.com/skia/+/93242c4ae50dfcc0d922cdb3ba80bbc7b4bbe93d
==========

to

==========
Batched implementation of drawLattice() for GPU

Bechmarks (Nexus 6P):

Src=100x100, Dst=250x250, NumRects=9
Android              77.7us
Skia (without patch) 57.2us
Skia (with patch)    34.7us

Src=100x100, Dst=500x500, NumRects=9
Android              77.0us
Skia (without patch) 56.9us
Skia (with patch)    44.5us

Src=100x100, Dst=1000x1000, NumRects=9
Android              180us
Skia (without patch) 96.8us
Skia (with patch)    70.5us

Src=100x100, Dst=250x250, NumRects=15
Android              208us
Skia (without patch) 155us
Skia (with patch)    55.9us

Src=100x100, Dst=500x500, NumRects=15
Android              207us
Skia (without patch) 152us
Skia (with patch)    63.0us

Src=100x100, Dst=1000x1000, NumRects=15
Android              233us
Skia (without patch) 156us
Skia (with patch)    99.9us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002

Committed:
https://skia.googlesource.com/skia/+/93242c4ae50dfcc0d922cdb3ba80bbc7b4bbe93d
==========

[msarett, 2016-08-18 21:50:31]

The CQ bit was checked by msarett@google.com to run a CQ dry run

[commit-bot: I haz the power, 2016-08-18 21:50:39]

Dry run: CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[msarett, 2016-08-18 21:56:46]

Description was changed from

==========
Batched implementation of drawLattice() for GPU

Bechmarks (Nexus 6P):

Src=100x100, Dst=250x250, NumRects=9
Android              77.7us
Skia (without patch) 57.2us
Skia (with patch)    34.7us

Src=100x100, Dst=500x500, NumRects=9
Android              77.0us
Skia (without patch) 56.9us
Skia (with patch)    44.5us

Src=100x100, Dst=1000x1000, NumRects=9
Android              180us
Skia (without patch) 96.8us
Skia (with patch)    70.5us

Src=100x100, Dst=250x250, NumRects=15
Android              208us
Skia (without patch) 155us
Skia (with patch)    55.9us

Src=100x100, Dst=500x500, NumRects=15
Android              207us
Skia (without patch) 152us
Skia (with patch)    63.0us

Src=100x100, Dst=1000x1000, NumRects=15
Android              233us
Skia (without patch) 156us
Skia (with patch)    99.9us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002

Committed:
https://skia.googlesource.com/skia/+/93242c4ae50dfcc0d922cdb3ba80bbc7b4bbe93d
==========

to

==========
Batched implementation of drawLattice() for GPU

Bechmarks (Nexus 6P):

Src=100x100, Dst=250x250, NumRects=9
Android              77.7us
Skia (without patch) 57.2us
Skia (with patch)    30.9us

Src=100x100, Dst=500x500, NumRects=9
Android              77.0us
Skia (without patch) 56.9us
Skia (with patch)    31.8us

Src=100x100, Dst=1000x1000, NumRects=9
Android              180us
Skia (without patch) 96.8us
Skia (with patch)    70.5us

Src=100x100, Dst=250x250, NumRects=15
Android              208us
Skia (without patch) 155us
Skia (with patch)    38.2us

Src=100x100, Dst=500x500, NumRects=15
Android              207us
Skia (without patch) 152us
Skia (with patch)    38.4us

Src=100x100, Dst=1000x1000, NumRects=15
Android              233us
Skia (without patch) 156us
Skia (with patch)    99.9us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002

Committed:
https://skia.googlesource.com/skia/+/93242c4ae50dfcc0d922cdb3ba80bbc7b4bbe93d
==========

[commit-bot: I haz the power, 2016-08-18 22:44:27]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-08-18 22:44:29]

Dry run: This issue passed the CQ dry run.

[msarett, 2016-08-18 22:45:05]

The CQ bit was checked by msarett@google.com

[msarett, 2016-08-18 22:45:05]

The patchset sent to the CQ was uploaded after l-g-t-m from bsalomon@google.com
Link to the patchset: https://codereview.chromium.org/2255963002/#ps200001
(title: "Speculative reland")

[commit-bot: I haz the power, 2016-08-18 22:45:09]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2016-08-18 22:46:06]

Description was changed from

==========
Batched implementation of drawLattice() for GPU

Bechmarks (Nexus 6P):

Src=100x100, Dst=250x250, NumRects=9
Android              77.7us
Skia (without patch) 57.2us
Skia (with patch)    30.9us

Src=100x100, Dst=500x500, NumRects=9
Android              77.0us
Skia (without patch) 56.9us
Skia (with patch)    31.8us

Src=100x100, Dst=1000x1000, NumRects=9
Android              180us
Skia (without patch) 96.8us
Skia (with patch)    70.5us

Src=100x100, Dst=250x250, NumRects=15
Android              208us
Skia (without patch) 155us
Skia (with patch)    38.2us

Src=100x100, Dst=500x500, NumRects=15
Android              207us
Skia (without patch) 152us
Skia (with patch)    38.4us

Src=100x100, Dst=1000x1000, NumRects=15
Android              233us
Skia (without patch) 156us
Skia (with patch)    99.9us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002

Committed:
https://skia.googlesource.com/skia/+/93242c4ae50dfcc0d922cdb3ba80bbc7b4bbe93d
==========

to

==========
Batched implementation of drawLattice() for GPU

Bechmarks (Nexus 6P):

Src=100x100, Dst=250x250, NumRects=9
Android              77.7us
Skia (without patch) 57.2us
Skia (with patch)    30.9us

Src=100x100, Dst=500x500, NumRects=9
Android              77.0us
Skia (without patch) 56.9us
Skia (with patch)    31.8us

Src=100x100, Dst=1000x1000, NumRects=9
Android              180us
Skia (without patch) 96.8us
Skia (with patch)    70.5us

Src=100x100, Dst=250x250, NumRects=15
Android              208us
Skia (without patch) 155us
Skia (with patch)    38.2us

Src=100x100, Dst=500x500, NumRects=15
Android              207us
Skia (without patch) 152us
Skia (with patch)    38.4us

Src=100x100, Dst=1000x1000, NumRects=15
Android              233us
Skia (without patch) 156us
Skia (with patch)    99.9us

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2255963002

Committed:
https://skia.googlesource.com/skia/+/93242c4ae50dfcc0d922cdb3ba80bbc7b4bbe93d
Committed:
https://skia.googlesource.com/skia/+/10e3d9bf59bdec92c05367ae0b71e1ce1ee4a690
==========

[commit-bot: I haz the power, 2016-08-18 22:46:07]

Committed patchset #8 (id:200001) as
https://skia.googlesource.com/skia/+/10e3d9bf59bdec92c05367ae0b71e1ce1ee4a690