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8333893: Optimization for StringBuilder append boolean & null

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Reviewed-by: liach
This commit is contained in:
Shaojin Wen 2024-11-05 15:05:33 +00:00
parent c33a8f52b6
commit 5890d9438b
5 changed files with 113 additions and 52 deletions
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71
test/micro/org/openjdk/bench/java/lang/StringBuilders.java
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@ -226,17 +226,66 @@ public class StringBuilders {
@Benchmark
public String toStringCharWithBool8() {
StringBuilder result = new StringBuilder();
result.append(true);
result.append(false);
result.append(true);
result.append(true);
result.append(false);
result.append(true);
result.append(false);
result.append(false);
return result.toString();
public int appendWithBool8Latin1() {
StringBuilder buf = sbLatin1;
buf.setLength(0);
buf.append(true);
buf.append(false);
buf.append(true);
buf.append(true);
buf.append(false);
buf.append(true);
buf.append(false);
buf.append(false);
return buf.length();
}
@Benchmark
public int appendWithBool8Utf16() {
StringBuilder buf = sbUtf16;
buf.setLength(0);
buf.append(true);
buf.append(false);
buf.append(true);
buf.append(true);
buf.append(false);
buf.append(true);
buf.append(false);
buf.append(false);
return buf.length();
}
@Benchmark
public int appendWithNull8Latin1() {
StringBuilder buf = sbLatin1;
buf.setLength(0);
buf.append((String) null);
buf.append((String) null);
buf.append((String) null);
buf.append((String) null);
buf.append((String) null);
buf.append((String) null);
buf.append((String) null);
buf.append((String) null);
return buf.length();
}
@Benchmark
public int appendWithNull8Utf16() {
StringBuilder buf = sbUtf16;
buf.setLength(0);
buf.append((String) null);
buf.append((String) null);
buf.append((String) null);
buf.append((String) null);
buf.append((String) null);
buf.append((String) null);
buf.append((String) null);
buf.append((String) null);
return buf.length();
}