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git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1233 632fc199-4ca6-4c93-a231-07263d6284db
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DRC
2014-04-15 03:07:44 +00:00
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@@ -42,11 +42,11 @@ later. OS X 10.4 "Tiger" is no longer supported.
[5] The Huffman encoder now uses clz and bsr instructions for bit counting on [5] The Huffman encoder now uses clz and bsr instructions for bit counting on
ARM platforms rather than a lookup table. This reduces the memory footprint ARM platforms rather than a lookup table. This reduces the memory footprint
by 64k, which may be important for some mobile applications. Out of four by 64k, which may be important for some mobile applications. Out of four
Android devices that were tested, two demonstrated a small loss (~3-4% on Android devices that were tested, two demonstrated a small overall performance
average) with ARMv6 code and a small gain (also ~3-4%) with ARMv7 code when loss (~3-4% on average) with ARMv6 code and a small gain (also ~3-4%) with
enabling this new feature, but the other two devices demonstrated a ARMv7 code when enabling this new feature, but the other two devices
significant performance gain across the board (~10-20%.) Actual mileage may demonstrated a significant overall performance gain with both ARMv6 and ARMv7
vary. code (~10-20%.) Actual mileage may vary.
1.3.1 1.3.1