zhangjun/swift

Basic C++ library on linux platform

Swift

Swift is a basic C++ library on linux platform which using c++11.

Dependencies

• additional platform specific dependencies:

  Ubuntu 13.10 or late 64-bit

  • g++
  • Cmake
  • libgtest-dev
  • libgoogle-glog-dev
  • libgflags-dev
  • unit test need libssl-dev

Build

cd Swift && ./build.sh
foundational libraries are in Swift/build/debug(release)/lib
runnable programs of unit test at Swift/build/debug(release)/bin
strongly recommend running the unit test

Computer Latency Numbers

L1 cache reference ......................... 0.5 ns
Branch mispredict ............................ 5 ns
L2 cache reference ........................... 7 ns
Mutex lock/unlock ........................... 25 ns
Main memory reference ...................... 100 ns
Compress 1K bytes with Zippy ............. 3,000 ns  =   3 µs
Send 2K bytes over 1 Gbps network ....... 20,000 ns  =  20 µs
SSD random read ........................ 150,000 ns  = 150 µs
Read 1 MB sequentially from memory ..... 250,000 ns  = 250 µs
Round trip within same datacenter ...... 500,000 ns  = 0.5 ms
Read 1 MB sequentially from SSD* ..... 1,000,000 ns  =   1 ms
Disk seek ........................... 10,000,000 ns  =  10 ms
Read 1 MB sequentially from disk .... 20,000,000 ns  =  20 ms
Send packet CA->Netherlands->CA .... 150,000,000 ns  = 150 ms