jsancio commented on a change in pull request #10334:
URL: https://github.com/apache/kafka/pull/10334#discussion_r596315922
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File path: metadata/src/main/java/org/apache/kafka/timeline/BaseHashTable.java
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@@ -56,12 +61,27 @@
this.elements = new Object[expectedSizeToCapacity(expectedSize)];
}
+ /**
+ * Calculate the capacity we should provision, given the expected size.
+ *
+ * Our capacity must always be a power of 2, and never less than 2.
+ */
static int expectedSizeToCapacity(int expectedSize) {
- if (expectedSize <= 1) {
- return 2;
+ if (expectedSize >= MAX_CAPACITY / 2) {
+ return MAX_CAPACITY;
+ }
+ return Math.max(MIN_CAPACITY, roundUpToPowerOfTwo(expectedSize * 2));
Review comment:
@cmccabe Why do we double the `expectedSize`? For example, why is the
capacity `8` when the expected size `3`? Shouldn't the capacity be `4` when the
expected size is `3`?
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