Hint GCC on branch prediction

Declare and use the macros:

	#ifdef __GNUC__
	#define LIKELY(x) __builtin_expect(!!(x), 1)
	#define UNLIKELY(x) __builtin_expect(!!(x), 0)
	#else
	#define LIKELY(x) (x)
	#define UNLIKELY(x) (x)
	#endif

view raw branch_predict_decl.c hosted with ❤ by GitHub

	if (UNLIKELY(x != OK))
	{
	/* ... */
	}

view raw branch_predict_use.c hosted with ❤ by GitHub

A simple thread pool in Python

Implement a simple thread pool in a couple of lines.

	from multiprocessing import Pool
	from multiprocessing.dummy import Pool as ThreadPool
	def f(x):
	print("Test {}".format(str(x)))
	pool = ThreadPool()
	# pool = Pool() for process pool
	pool.map(f, range(100))
	pool.close()
	pool.join()

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