What’s new in PyPy 2.5.1¶
Non-blocking file reads sometimes raised EAGAIN even though they had buffered data waiting, fixed in b1c4fcb04a42
Fix a bug in cpyext in multithreded programs acquiring/releasing the GIL
Avoid tracing all stack roots during repeated minor collections, by ignoring the part of the stack that didn’t change
Update stdlib to version 2.7.9
Fix exception being raised by kqueue.control (CPython compatibility)
Add an alternative location to save LastError, errno around ctypes, cffi external calls so things like pdb will not overwrite it
Speed up the warmup times of the JIT by removing a quadratic algorithm in the heapcache.
Simplify flow graphs on the fly during annotation phase.