jpountz opened a new issue, #15024:
URL: https://github.com/apache/lucene/issues/15024
`Lucene99HnswVectorsReader` computes prefix sums by doing:
```java
currentNeighborsBuffer[0] = dataIn.readVInt();
for (int i = 1; i < arcCount; i++) {
currentNeighborsBuffer[i] = currentNeighborsBuffer[i - 1] +
dataIn.readVInt();
}
```
However, the investigation on #14979 suggests that a faster way of writing
this loop would be
```java
int sum = 0;
for (int i = 0; i < arcCount; i++) {
sum += dataIn.readVInt();
currentNeighborsBuffer[i] = sum;
}
```
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