StartupsDatadogabout 17 hours ago
Datadog cuts APM Java startup with trie constant
1 min read
Datadog's APM Java team reduced class-matching overhead by 30% over four years. They encoded a prefix trie as a JVM string constant, loaded via a single bytecode instruction, replacing a hand-rolled matcher. The ClassNameTrie avoids resource loading and I/O during premain, improving startup performance.
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