AWS Open Source Blog

Letu Yang

Author: Letu Yang

Letu is a Software Development Engineer from the AWS Quantum Ledger Database (QLDB) team. Previously, Letu had also worked at Amazon Corretto, Kinesis Data Stream, SQS, and AmazonMQ teams within AWS. One of the main areas Letu had been working on was Java Runtime performance, and he had collaborated with many internal teams on related issues. Letu had a PhD degree in formal verification, and also spent a couple of years previously on security products.

JVM pause times chart

Introducing Heapothesys, an open source Java GC latency benchmark with predictable allocation rates

The Amazon Corretto team introduces the open source Heapothesys benchmark, a synthetic workload that simulates fundamental application characteristics that affect garbage collector (GC) latency. The benchmark creates and tests GC load scenarios defined by object allocation rates, heap occupancy, and JVM flags, then reports the resulting JVM pauses. OpenJDK developers can thus produce reference points […]