Faster Zlib Performance On ARM Thanks To NEON
Written by Michael Larabel in Free Software on 31 August 2018 at 06:50 AM EDT. 9 Comments
FREE SOFTWARE --
ARM developer Adenilson Cavalcanti has been working on optimizing the Zlib compression/decompression performance on ARM systems.

By making use of ARM's NEON instructions for SIMD, Adenilson was successful in squeezing better performance out of the ARM chips, among other tuning. With the Chromium Zlib code they were able to make compression 1.36x faster on average or 1.4x for compressing HTML. For decompression speeds they were 1.6x faster with Gzip and 1.8x faster for HTML.

Their end result for Chromium's Zlib (c-zlib) is yielding decompression speeds 1.7~2.0x faster and compression 1.3~1.4x faster. In the process, some of the Intel Zlib performance is also improved. ARM is encouraging users to move over to Chromium's Zlib code.

Those interested in Zlib compression on ARM can see this slide deck from the results presented at this week's Open-Source Summit. Those wanting to experiment with the Chromium Zlib code can find it on Chromium.org.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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