David Brown Adobe-Android
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| # Xcode 4.3.3 | |
| Apple clang version 3.1 (tags/Apple/clang-318.0.61) (based on LLVM 3.1svn) | |
| Target: x86_64-apple-darwin11.4.0 | |
| Thread model: posix | |
| # Xcode 4.3.2 | |
| Apple clang version 3.1 (tags/Apple/clang-318.0.58) (based on LLVM 3.1svn) | |
| Target: x86_64-apple-darwin11.4.0 | |
| Thread model: posix |
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| Latency Comparison Numbers (~2012) | |
| ---------------------------------- | |
| L1 cache reference 0.5 ns | |
| Branch mispredict 5 ns | |
| L2 cache reference 7 ns 14x L1 cache | |
| Mutex lock/unlock 25 ns | |
| Main memory reference 100 ns 20x L2 cache, 200x L1 cache | |
| Compress 1K bytes with Zippy 3,000 ns 3 us | |
| Send 1K bytes over 1 Gbps network 10,000 ns 10 us | |
| Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD |
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