[dart-misc] Optimizing int32 operations + benchmark

'Vyacheslav Egorov' via Dart Misc

2017-05-17 11:27:06 UTC

Hey Carlos,

Post by Carlos Ballesteros Velasco
If required, I can put here the .js file (running with node-v8 -v6.10.0)

and dart file running with (Dart VM version: 1.23.0 (Fri Apr 21 03:13:00
2017) on "windows_x64")

Can you put them somewhere? It would be easier for us to run benchmarks
without installing the whole thing.

// Vyacheslav Egorov

On Wed, May 17, 2017 at 1:17 AM, Carlos Ballesteros Velasco <

Post by Carlos Ballesteros Velasco
Hello. I'm creating a conversor from JVM bytecode to Dart. In fact, it
works already. And now I'm trying to optimize it as much as I can in this
stage.
https://github.com/jtransc/jtransc/tree/master/jtransc-gen-dart
https://github.com/jtransc/jtransc/blob/8eca4a98c43f35a7a692851f0dcb5b
d74e6d78bf/jtransc-rt/resources/dart/Base.dart
I was generating pure JS already. And My benchmark tells me that JS
version is faster.
In JS when performing int32 operations I'm doing the |0 trick: ((a+b)|0)
In Dart I'm using the function N.I(a+b) ----- static int32 I(int v) {
return (v & 0x7fffffff) - (v & 0x80000000); }
Has Dart intrinsics to optimize that kind of int32 operations?
https://github.com/jtransc/jtransc/blob/8eca4a98c43f35a7a692851f0dcb5b
d74e6d78bf/jtransc-rt/resources/dart/Base.dart#L56
git clone https://github.com/jtransc/jtransc.git
pushd jtransc
./gradlew install
popd
git clone https://github.com/jtransc/jtransc-benchmark.git
pushd jtransc-benchmark/benchmark
./gradlew rundart
./gradlew runjs
popd
If required, I can put here the .js file (running with node-v8 -v6.10.0)
and dart file running with (Dart VM version: 1.23.0 (Fri Apr 21 03:13:00
2017) on "windows_x64")
They both are generated from the same AST, so the structure is identical.
------------
Benchmark source code: https://github.com/jtransc/jtransc-benchmark/blob/
9ecdf7bb060fb7087509dfa06ae08b900961d70e/benchmark/src/Benchmark.java
JTransc 0.5.16 - dart
Java 1.8.0_51 - 25.51-b03 - 1.8.0_51-b16
plain loops...24.0
*left shift...73.0*
*right shift...76.0*
*right unsigned shift...79.0*
call static mult...49.0
call instance mult...50.0
call instance div...141.0
instanceof classes...87.0
arraycopy int...10.0
write byte[]...41.0
write short[]...36.0
write char[]...34.0
write int[]...45.0
write float[]...43.0
write double[]...55.0
String Builder 1...66.0
String Builder 2...28.0
long arithmetic...157.0
simd mutable...41.0
simd immutable...219.0
simd mutable matrix mult...149.0
StringBuilder1...83.0
StringBuilder2...83.0
Create Instances1...2.0
Create Instances2...2.0
Create Instances with builder...256.0
*Java's CRC32...462.0*
*jzlib's CRC32...178.0*
*compress java's Deflate...2882.0*
*compress jzlib...2945.0*
---------------
JTransc 0.5.16 - js
Java 1.8.0_51 - 25.51-b03 - 1.8.0_51-b16
plain loops...9.167123
*left shift...18.907874*
*right shift...17.907579*
*right unsigned shift...21.689226 <21%2068%2092%2026>*
call static mult...15.011354
call instance mult...14.997497
call instance div...94.273156
instanceof classes...378.080885
arraycopy int...13.711299
write byte[]...32.97181
write short[]...34.282805
write char[]...33.745643
write int[]...35.28383
write float[]...42.055787
write double[]...38.582287
String Builder 1...128.865203
String Builder 2...27.21437
long arithmetic...189.857672
simd mutable...97.261278 <97%2026%2012%2078>
simd immutable...132.938952
simd mutable matrix mult...520.873637
StringBuilder1...64.82517
StringBuilder2...65.545762
Create Instances1...9.613116
Create Instances2...7.370748
Create Instances with builder...156.698057
*Java's CRC32...104.484334*
*jzlib's CRC32...95.406556*
*compress java's Deflate...159.09942*
*compress jzlib...160.694131*
Thanks in advance. And congratulations for the dart project!
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