The New .NET JIT Compiler, RyuJITMay 14, 2015
The JIT compiler is one of the key investment areas to improve app performance. The .NET team announced the CTP release of the next-generation x64 JIT compiler, code-named “RyuJIT.” RyuJIT is twice as fast in compiling code relative to the existing x64 JIT compiler, meaning apps using RyuJIT start up to 30 percent faster depending on the percentage of startup time that’s spent in JIT compilation. (Note that time spent in the JIT compiler is only one component of start up time among others, thus the app doesn't start twice as fast because the JIT is twice as fast.) At the same time, RyuJIT doesn't compromise on code quality, and the modern JIT compiler opens up more avenues for future code quality optimizations. RyuJIT is released around the same time as of the release of .NET Framework 4.5.1.