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1
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2
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public class LambdaVsAnonymousInner
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3
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{
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4
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private static final long ITERATIONS = 10000000000L;
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5
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int value1 = 0;
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int value2 = 0;
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8
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public void loopInner(long num)
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10
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{
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for (long i = 0; i < num; i++)
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12
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{
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Worker<Object> worker = new Worker<Object>()
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14
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{
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public void process(Object obj)
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{
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value1++;
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}
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};
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worker.process(null);
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22
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}
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}
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public void loopInnerNoCapture(long num)
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{
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for (long i = 0; i < num; i++)
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{
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29
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Worker<LambdaVsAnonymousInner> worker = new Worker<LambdaVsAnonymousInner>()
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30
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{
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public void process(LambdaVsAnonymousInner me)
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32
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{
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me.value1++;
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34
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}
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};
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36
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worker.process(this);
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}
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}
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40
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public void loopLambda(long num)
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{
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for (long i = 0; i < num; i++)
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44
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{
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Worker<Object> worker = (Object obj) -> { value2++; };
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46
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worker.process(null);
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47
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}
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48
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}
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49
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50
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public void loopLambdaNoCapture(long num)
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51
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{
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52
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for (long i = 0; i < num; i++)
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53
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{
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54
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Worker<LambdaVsAnonymousInner> worker = (LambdaVsAnonymousInner me) -> { me.value2++; };
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55
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worker.process(this);
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56
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}
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}
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public static void main(String[] args)
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60
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{
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LambdaVsAnonymousInner test = new LambdaVsAnonymousInner();
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62
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long start = System.currentTimeMillis();
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64
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test.loopLambdaNoCapture(ITERATIONS);
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66
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long end = System.currentTimeMillis();
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68
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System.out.printf("lambda no capture loop millis = %d\n", end - start);
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70
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start = System.currentTimeMillis();
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72
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73
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test.loopLambda(ITERATIONS);
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74
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end = System.currentTimeMillis();
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76
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System.out.printf("lambda with capture loop millis = %d\n", end - start);
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78
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start = System.currentTimeMillis();
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80
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81
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test.loopInner(ITERATIONS);
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82
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83
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end = System.currentTimeMillis();
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84
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85
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System.out.printf("inner class loop millis = %d\n", end - start);
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86
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87
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start = System.currentTimeMillis();
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88
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89
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test.loopInnerNoCapture(ITERATIONS);
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90
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91
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end = System.currentTimeMillis();
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92
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93
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System.out.printf("inner class loop no capture loop millis = %d\n", end - start);
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94
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}
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95
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96
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private interface Worker<T>
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97
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{
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98
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public void process(T obj);
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99
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}
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100
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}
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