32423a486d
Use thread-local buffers and deflater and inflater instances to speed up compressing and decompressing from in-memory bytes. Not manually invoking `end()` on these should be safe since their off-heap memory will eventually be reclaimed by the finalizer thread which should not be an issue for thread-locals that are not instantiated at a high frequency. This significantly reduces the amount of byte copying and object creation relative to the previous approach which had to create a fresh temporary buffer (that was then resized multiple times during operations), copied bytes out of that buffer to a freshly allocated `byte[]`, used 4k stream buffers needlessly when working with bytes that are already in arrays (`writeTo` handles efficient writing to the compression logic now) etc. Relates #57284 which should be helped by this change to some degree. Also, I expect this change to speed up mapping/template updates a little as those make heavy use of these code paths. |
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