Simple python class to log performance durations.

perfclass.py

import time

class PerfClass:
    '''
    Simple python class to take performance measurements
    Usage:
    import time
    
    perf = PerfClass()
    start = time.perf_counter()
    do_something_you_want_to_profile()
    perf_class.log("something you want to profile", start)
    ...
    
    
    perf_class.dump()
    '''
    def __init__(self):
        self.perf_dict = {}

    def log(self, entry, start_time):
        duration = time.process_time() - start_time
        if entry not in self.perf_dict:
            self.perf_dict[entry] = ( duration, duration, duration, 1)
        else:
            min, max, avg, count = self.perf_dict[entry]
            if duration < min:
                min = duration
            if duration > max:
                max = duration
            count = count+1
            avg = (avg*(count-1))/(count) + duration/count
            self.perf_dict[entry] = (min, max, avg, count)

    def dump(self):
        if len(self.perf_dict):
            print("Entry,Min (ms), Max (ms), Average (ms), Count")
        for entry in self.perf_dict:
            min, max, avg, count = self.perf_dict[entry]
            print(f"{entry},{min*1000},{max*1000},{avg*1000},{count}")