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Description:

cthreading 0.3

cthreading implements Python 2 Lock, RLock, and Condition in C, speeding
up threads synchronization and decreasing cpu usage.
Status:

Performance
cthreading eliminates the overhead of threading.RLock and
threading.Condition which are implemented in pure Python in Python 2.
In particular, threading.Condition is implemented using polling. In
Python 3 threading.Condition is implemented without polling;
cthreading implements a similar design in C.
$ time python whispers.py -m cthreading
real 0m2.664s
user 0m2.965s
sys 0m0.808s

$ time python3 whispers.py
real 0m9.664s
user 0m8.949s
sys 0m1.812s

$ time python whispers.py
real 0m14.914s
user 0m16.986s
sys 0m12.690s

$ time python whispers.py -m pthreading
real 0m20.169s
user 0m23.062s
sys 0m17.022s
Your application is unlikely to have similar workload; do not expect
this improvement.
For more info see https://github.com/nirs/cthreading/wiki/performance.

Usage
Import cthreading before any other module and monkeypatch the thread and
threading modules. From this point, threading.Lock, threading.RLock, and
threading.Condition are using cthreading.
import cthreading
cthreading.monkeypatch()
Note: cthreading will raise RuntimeError if the threading module was
imported before cthreading.monkeypatch() is called.

Tested platforms

x86_64

Fedora 22 / Python 2.7.10
RHEL 7.2 / Python 2.7.5
RHEL 7.2 / Python 2.7.10+ (upstream)
RHEL 7.1 / Python 2.7.5
RHEL 6.7 / Python-2.6.6
Ubuntu 14.04 Server / Python 2.7.6
Ubuntu 12.04 Server / Python 2.7.3 (python regression tests not available)
Ubuntu 12.04 / Python 2.6.9 (Travis container)
Ubuntu 12.04 / Python 2.7.9 (Travis container)

POWER8E

RHEL 7.2 / Python 2.7.5
RHEL 7.2 / Python 2.7.10+ (upstream)

Hacking
For rpm based distributions:
yum install python-devel python-test
For deb based distributions:
apt-get install python-dev libpython2.7-testsuite
Installing Python packages:
pip install pytest pytest-timeout yappi==0.93
Building and running the quick tests:
make
Before submitting patches, run the Python regression tests suite:
make regrtest
Check the Makefile for more info.

Similar projects

pthreading - uses
pthread_mutex and pthread_cond apis directly via ctypes. This
introduces undefined behavior and actually slower and increases cpu
usage in most cases compared to the original Python implementation.