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8349183: [BACKOUT] Optimization for StringBuilder append boolean & null

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8349239: [BACKOUT] Reuse StringLatin1::putCharsAt and StringUTF16::putCharsAt

Reviewed-by: redestad, liach
This commit is contained in:
Jaikiran Pai 2025-02-03 18:21:33 +00:00
parent bb837d2f9b
commit 618c5eb27b
6 changed files with 88 additions and 121 deletions
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71
test/micro/org/openjdk/bench/java/lang/StringBuilders.java
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@ -274,66 +274,17 @@ public class StringBuilders {
}
@Benchmark
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();
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();
}