System: 1 GHz ARM Cortex A9 (Pandaboard)
Compiler: gcc 4.4.5 (native)
Configure settings: --enable-single --enable-neon --enable-armv7a-cycle-counter ARM_CPU_TYPE=cortex-a9
Configure settings for slow timer: --enable-single --enable-neon --with-slow-timer ARM_CPU_TYPE=cortex-a9
Configure settings for estimate: --enable-single --enable-neon ARM_CPU_TYPE=cortex-a9
Comments: Similar results to the A8: estimate is OK for small FFTs, a cycle counter or slow timer are almost identical in performance and are significantly better for large.
Detailed NEON timing data for --enable-perf-events cases
Detailed NEON timing data for --with-slow-timer cases
Detailed NEON timing data for estimate cases
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