Add BufferedMurmur3Hasher to reduce allocations when hashing Strings#133226
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felixbarny merged 12 commits intoelastic:mainfrom Aug 22, 2025
Merged
Add BufferedMurmur3Hasher to reduce allocations when hashing Strings#133226felixbarny merged 12 commits intoelastic:mainfrom
felixbarny merged 12 commits intoelastic:mainfrom
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Pinging @elastic/es-storage-engine (Team:StorageEngine) |
kkrik-es
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| */ | ||
| public class BufferedMurmur3Hasher extends Murmur3Hasher { | ||
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| public static final int DEFAULT_BUFFER_SIZE = 32 * 4; // 32 characters, each character may take up to 4 bytes in UTF-8 |
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Maybe 128 * 4 to play it safe?
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As this is the default size, I'd like to be a bit more conservative with memory usage. This should probably also be enough for the OTLP endpoint as this is used primarily for attribute names. The attribute values are already in utf8-encoded byte arrays and directly use the update method.
kkrik-es
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server/src/test/java/org/elasticsearch/common/hash/BufferedMurmur3HasherTests.java
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Co-authored-by: Kostas Krikellas <131142368+kkrik-es@users.noreply.github.com>
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I've made another change to reduce the number of flushes. This should yield more throughput in the hasher as the amount of data it can hash at once is larger. |
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Part of #132566