Avoid extra byte array copying when downloading to memory with AsyncResponseTransformer #6348
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…esponseTransformer
dagnir
approved these changes
Aug 14, 2025
joviegas
reviewed
Aug 14, 2025
.../main/java/software/amazon/awssdk/core/internal/async/ByteArrayAsyncResponseTransformer.java
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Motivation and Context
Currently
ByteArrayAsyncResponseTransformerinvokesResponseBytes.fromByteArray()once all the data is downloaded, which copies the contents of the byte array when creatingResponseBytesModifications
replace
ResponseBytes.fromByteArray()withResponseBytes.fromByteArrayUnsafe(), which createsResponseByteswithout copying the contents of the byte arrayTesting
Performance tests showed increased throughput and decrease in latency
Screenshots (if appropriate)
Types of changes