The main goal of this library is to compare different writing styles to each other.
i.e. What is faster?
"$hello $world"
or
hello + " " + world ?
The point is to compare pieces of code rather than to compare Dart's VM against other VM's or runtimes.
This project is far from finished since it can grow infinitely. Eventually, the point is that the right conclusions and performance tips 'n tricks will be taken of it.
There are mainly three important ways of running the app:
- As Dart code, inside the Dart VM (Right Click 'Benchmark.dart' -- Click 'Run')
- As Dart code, inside Dartium (Right Click 'index.html' -- Click 'Run in Dartium')
- As JavaScript code, inside a Browser (Right Click 'index.html' -- Click 'Run as JavaScript')
Following results are run from my machine. This is a Windows 7, 64 bit machine with 16 gb of RAM.
All results are in milliseconds. The lower the number, the faster it's running.
| Benchmark | Standalone Dart VM | Dartium (Dart) | Google Chrome (JS) |
|---|---|---|---|
| Loops | |||
| ForInLoopClazz | 23034 | 19567 | 11760 |
| ForInLoopInt | 25212 | 21913 | 11485 |
| ForLoopClazz | 14364 | 14932 | 8255 |
| ForLoopInt | 18794 | 15059 | 8121 |
| ForeachClazz | 19485 | 19637 | 9547 |
| ForeachInt | 22617 | 19940 | 9718 |
| WhileLoopClazz | 14147 | 15052 | 9206 |
| WhileLoopInt | 18878 | 15392 | 8609 |
| Operator Overloading | |||
| NoOperatorOverloading | 2159 | 11386 | 20551 |
| OperatorOverloading | 2139 | 10192 | 3036 |
| String Concatenation | |||
| StringConcatenationAdjacentLiteral | 650 | 615 | 1209 |
| StringConcatenationInterpolation | 126750 | 142857 | 1536 |
| StringConcatenationPlusOperator | 428000 | 655250 | 1550 |
| StringConcatenationPlusOperatorLiteral | 442000 | 656000 | 1211 |
| StringConcatenationStringBuffer | 446600 | 587750 | 161153 |
| Typing | |||
| StrongTyping | 28985 | 29676 | 94772 |
| WeakTyping | 29130 | 29970 | 100800 |
- forEach() loops are about 2x slower than for(var i...) loops
- In Chrome, operator overloading is 8x faster than calling a method
- In the Dart VM, String Interpolation is 3x faster than the + Operator
- In Google Chrome, String Interpolation is just as fast as the + Operator
I'm a huge fan of discussion. If you see any faults or possible improvements, please contact me at hans@dotdotcommadot.com