Mercurial > projects > dynamin
annotate dynamin/core/benchmark.d @ 106:acdbb30fee7e
Port to D2.
Most of the effort was dealing with immutable and const.
| author | Jordan Miner <jminer7@gmail.com> |
|---|---|
| date | Mon, 17 Dec 2012 23:41:50 -0600 |
| parents | 5c8c1c2e12c0 |
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| rev | line source |
|---|---|
| 0 | 1 |
| 2 /* | |
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73060bc3f004
Change license to Boost 1.0 and MPL 2.0.
Jordan Miner <jminer7@gmail.com>
parents:
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3 * Copyright Jordan Miner |
| 0 | 4 * |
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73060bc3f004
Change license to Boost 1.0 and MPL 2.0.
Jordan Miner <jminer7@gmail.com>
parents:
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changeset
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5 * Distributed under the Boost Software License, Version 1.0. |
|
73060bc3f004
Change license to Boost 1.0 and MPL 2.0.
Jordan Miner <jminer7@gmail.com>
parents:
0
diff
changeset
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6 * (See accompanying file BOOST_LICENSE.txt or copy at |
|
73060bc3f004
Change license to Boost 1.0 and MPL 2.0.
Jordan Miner <jminer7@gmail.com>
parents:
0
diff
changeset
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7 * http://www.boost.org/LICENSE_1_0.txt) |
| 0 | 8 * |
| 9 */ | |
| 10 | |
| 11 module dynamin.core.benchmark; | |
| 12 | |
| 13 import dynamin.all_core; | |
| 14 import dynamin.core.string; | |
| 15 import tango.io.Stdout; | |
| 16 | |
| 17 /** | |
| 18 * Returns: The average number of milliseconds one call of the specified | |
| 19 * delegate took. | |
| 20 */ | |
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21 double benchmark(int repetitions, void delegate() dg) { // use static opCall()? |
| 0 | 22 long time = Environment.runningTime; |
| 23 for(int i = 0; i < repetitions; ++i) | |
| 24 dg(); | |
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25 return (Environment.runningTime-time)/cast(double)repetitions; |
| 0 | 26 } |
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27 double benchmark(void delegate() dg) { |
| 0 | 28 return benchmark(1, dg); |
| 29 } | |
| 30 /** | |
| 31 * name can be null | |
| 32 */ | |
| 106 | 33 double benchmarkAndWrite(cstring name, int repetitions, void delegate() dg) { |
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5c8c1c2e12c0
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parents:
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diff
changeset
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34 double time = benchmark(repetitions, dg); |
| 0 | 35 Stdout.format("{} took {:.2}ms.", name, time).newline; // TODO: verify :.2 |
| 36 return time; | |
| 37 } | |
| 106 | 38 double benchmarkAndWrite(cstring name, void delegate() dg) { |
| 0 | 39 return benchmarkAndWrite(name, 1, dg); |
| 40 } | |
| 41 | |
| 42 /** | |
| 106 | 43 * As the constructor calls the start() method, the only time one would need |
| 0 | 44 * to is when reusing a Benchmark object. |
| 45 */ | |
| 46 class Benchmark { | |
| 47 long _startTime; | |
| 48 this() { | |
| 49 start(); | |
| 50 } | |
| 51 void start() { | |
| 52 _startTime = Environment.runningTime; | |
| 53 } | |
| 54 long time() { | |
| 55 return _startTime-Environment.runningTime; | |
| 56 } | |
| 106 | 57 void writeTime(cstring opName) { |
| 0 | 58 if(opName is null) |
| 59 opName = "Benchmark"; | |
| 60 Stdout.format("{} took {}ms.", opName, time).newline; | |
| 61 } | |
| 62 | |
| 63 /** | |
| 64 * calls the specified delegate the specified number of times and | |
| 65 * returns the average time one call took | |
| 66 */ | |
| 67 static long measure(int times, void delegate() d) { | |
| 68 long time = Environment.runningTime; | |
| 69 for(int i = 0; i < times; ++i) | |
| 70 d(); | |
| 71 return (Environment.runningTime-time)/times; | |
| 72 } | |
| 73 } |