XCache: A simplest and thread-safe LRU cache, which support key-func, release-func and hit-stat.

Setup

pip install xcache-lib

Key Features

• LRU cache
• Thread safe
• Support special key function
• Support special release function
• Has detail hit stat

Core Function Descriptor: xcache

@xcache(cache_size, key_func=None, release_func=None, log_keys=False)

Quick Start

from xcache import xcache, show_xcache_hit_stat


@xcache(3, key_func=lambda x,y: x, log_keys=True)
def calc(x, y):
    print("calc {}, {}".format(x, y))
    return x + y


if __name__ == "__main__":
    print(calc(5, 6))
    print(calc(5, 6))
    print(calc(5, 6))
    print(calc(5, 5))
    print(calc(4, 6))
    print(calc(3, 6))
    print(calc(2, 6))
    print(calc(1, 6))
    print(calc(9, 6))

    print(json.dumps(show_xcache_hit_stat(x), indent=4))  # show detail hit stat

outputs:

calc 5, 6
11
11
11
calc 5, 5
10
calc 4, 6
10
calc 3, 6
9
calc 2, 6
8
calc 1, 6
7
calc 9, 6
15
{
    "hit_rate": 22.22222222222222, 
    "dup_calc_rate": 0.6666666666666666, 
    "hit": [
        2, 
        7
    ], 
    "keys_num": 1, 
    "detail": {
        "key_detail": {
            "1": 6, 
            "3": 1
        }, 
        "hit_detail": {
            "2": 1
        }
    }
}