On Thu, 20 Jun 2024 21:53:25 GMT, Justin Lu <[email protected]> wrote:
> > It requires append(int), but the Appendable has no such method.
>
> If via `Appendable` we don't have access to `append(int)`, can we simply
> `append(String.valueOf(int))`. And similarly for `append(char[], int, int)`,
> can we `append(String.valueOf(char[], int, int))`.
>
> According to the method descriptions in `AbstractStringBuilder`, this should
> behaviorally be the same. That way we don't have to add any new classes, and
> can continue with the generic implementation.
If do that ,there is some performance degradation.
Benchmark Mode Cnt
Score Error Units
AppendableTest.tesAppendableAppendCharAscii avgt 50
33.628 ± 0.263 ns/op
AppendableTest.tesAppendableAppendCharMixNoAsciiChars avgt 50
33.522 ± 0.245 ns/op
AppendableTest.testAppendableAppendInt avgt 50
32.602 ± 0.186 ns/op
AppendableTest.testStringBufferAppendCharArrayAscii avgt 50
31.028 ± 0.134 ns/op
AppendableTest.testStringBufferAppendCharArrayMixNoAsciiChars avgt 50
31.075 ± 0.158 ns/op
AppendableTest.testStringBufferAppendInt avgt 50
25.706 ± 0.268 ns/op
@BenchmarkMode(Mode.AverageTime)
@Warmup(iterations = 5, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@Measurement(iterations = 10, time = 500, timeUnit = TimeUnit.MILLISECONDS)
@State(Scope.Thread)
@OutputTimeUnit(TimeUnit.NANOSECONDS)
public class AppendableTest {
private StringBuffer sb;
private Appendable appendable;
private char[] asciiChars;
private char[] mixNoAsciiChars;
@Setup(Level.Iteration)
public void setup() {
sb = new StringBuffer();
appendable = sb;
asciiChars = "Criticism appears to Anatole France the most recent and
possibly the ultimate evolution".toCharArray();
mixNoAsciiChars = "The 测试数据 above mentioned two volumes of poetry were
followed by many works in prose, which we shall notice. France’s critical
writings".toCharArray();
}
@Benchmark
public void testStringBufferAppendInt() throws InterruptedException {
sb.append(12345890);
}
@Benchmark
public void testAppendableAppendInt() throws InterruptedException,
IOException {
appendable.append(String.valueOf(12345890));
}
@Benchmark
public void testStringBufferAppendCharArrayAscii() throws
InterruptedException {
sb.append(asciiChars, 40, 18);
}
@Benchmark
public void tesAppendableAppendCharAscii() throws InterruptedException,
IOException {
appendable.append(new String(asciiChars, 40, 18));
}
@Benchmark
public void testStringBufferAppendCharArrayMixNoAsciiChars() throws
InterruptedException {
sb.append(mixNoAsciiChars, 40, 18);
}
@Benchmark
public void tesAppendableAppendCharMixNoAsciiChars() throws
InterruptedException, IOException {
appendable.append(new String(mixNoAsciiChars, 40, 18));
}
}
-------------
PR Comment: https://git.openjdk.org/jdk/pull/19513#issuecomment-2181851223
