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improvements (#521)

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- inline computeIfAbsent
- replace arraycopy by copyOfRange

Co-authored-by: Yann Moisan <yann@zen.ly>
This commit is contained in:
Yann Moisan 2024-01-23 19:58:10 +01:00 committed by GitHub
parent c886aaba34
commit b3420d9348
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1 changed files with 10 additions and 7 deletions
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17
src/main/java/dev/morling/onebrc/CalculateAverage_YannMoisan.java
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@ -104,10 +104,7 @@ public class CalculateAverage_YannMoisan {
break; break;
field[fieldCurrentIndex++] = fieldByte; field[fieldCurrentIndex++] = fieldByte;
} }
var dst = new byte[fieldCurrentIndex]; var fieldStr = new Location(Arrays.copyOfRange(field, 0, fieldCurrentIndex));
System.arraycopy(field, 0, dst, 0, fieldCurrentIndex);
var fieldStr = new Location(dst);
// System.arraycopy(field, 0, dst, 0, fieldCurrentIndex);
var number = 0; var number = 0;
var sign = 1; var sign = 1;
while (bb.position() < limit) { while (bb.position() < limit) {
@ -119,9 +116,15 @@ public class CalculateAverage_YannMoisan {
else if (numberByte != '.') else if (numberByte != '.')
number = number * 10 + (numberByte - '0'); number = number * 10 + (numberByte - '0');
} }
stats.computeIfAbsent(fieldStr, var v = stats.get(fieldStr);
k -> new Stat()) if (v == null) {
.update(sign * number); var vv = new Stat();
vv.update(sign * number);
stats.put(fieldStr, vv);
}
else {
v.update(sign * number);
}
} }
return stats; return stats;