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tomhudson@google.com
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Issue <a href="/4571045/" onmouseover="M_showPopUp(this, 'popup-issue');">
4571045</a>:
New matrix benchmarks to evaluate ::setConcat implementation options
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<div><b>Created:</b><br>
16 minutes ago by me
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<div><b>Modified:</b><br>
0 minutes ago
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<a href="/user/reed1" onmouseover="M_showUserInfoPopup(this)">reed1</a>
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<pre>On platforms that use Float (instead of Fixed), SkMatrix stores its internal
values as floats, but setConcat() needs extra precision and so uses doubles to
contain intermediate values.
These three benchmarks compare the speed of float-only, double-only, and
float-cast-to-double implementations of a chunk of code extracted from the
non-perspective case of setConcat().
</pre>
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<b>me</b>
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13 minutes ago
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1. lets remove the "fix" from the function name. just muladdmul I think 2. we ...
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<pre name="cl-message-1">1. lets remove the "fix" from the function name. just muladdmul I think
2. we can remove the return, since it will be compiled away anyway
3. nice checkin comment!
4. what are the results like?</pre>
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> 4. what are the results like? For posterity: tomhudson@tomhudson-zx600-linux:/usr/local/google/src/skia3$ out/bench/bench -match matrix_concat -repeat 1000 ...
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<pre name="cl-message-2">> 4. what are the results like?
For posterity:
tomhudson@tomhudson-zx600-linux:/usr/local/google/src/skia3$ out/bench/bench
-match matrix_concat -repeat 1000
skia bench: alpha=0xFF antialias=1 filter=0
running bench [640 480] matrix_concat_double 8888: msecs = 0.79 565:
msecs = 0.79 GPU: msecs = 0.79
running bench [640 480] matrix_concat_floatdouble 8888: msecs = 0.97 565:
msecs = 0.97 GPU: msecs = 0.97
running bench [640 480] matrix_concat_float 8888: msecs = 0.74 565:
msecs = 0.73 GPU: msecs = 0.74</pre>
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<b>Issue 4571045: New matrix benchmarks to evaluate ::setConcat implementation options
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Created 16 minutes ago by me<br>
Modified 0 minutes ago<br>
Reviewers: reed1<br>
Base URL: http://skia.googlecode.com/svn/trunk/<br>
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On platforms that use Float (instead of Fixed), SkMatrix stores its internal
values as floats, but setConcat() needs extra precision and so uses doubles
to contain intermediate values.
These three benchmarks compare the speed of float-only, double-only, and
float-cast-to-double implementations of a chunk of code extracted from the
non-perspective case of setConcat().
git-svn-id: http://skia.googlecode.com/svn/trunk@1497 2bbb7eff-a529-9590-31e7-b0007b416f81
|
||
reed@google.com
|
3fb5187647 |
speed-up SkMatrix::preScale by 3x, by special-casing it instead of just calling
concat. Inspired by the profile of the fishtank site git-svn-id: http://skia.googlecode.com/svn/trunk@1462 2bbb7eff-a529-9590-31e7-b0007b416f81 |