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Scala 3 slowed us down?

(kmaliszewski9.github.io)
261 points kmaliszewski | 1 comments | 07 Dec 25 15:08 UTC | HN request time: 0.211s | source
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spockz ◴[07 Dec 25 16:15 UTC] No.46182774[source]▶
For me the main takeaway of this is that you want to have automated performance tests in place combined with insights into flamegraphs by default. And especially for these kind of major language upgrade changes.
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esafak ◴[07 Dec 25 16:32 UTC] No.46182923[source]▶
What are folks using for perf testing on JVM these days?
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1. cogman10 ◴[07 Dec 25 17:46 UTC] No.46183506[source]▶
For production systems I use flight recordings (jfrs). To analyze I use java mission control.

For OOME problems I use a heap dump and eclipse memory analysis tool.

For microbenchmarks, I use JMH. But I tend to try and avoid doing those.