From 2e114db5c96d27fbf5b4689e19baae1e5ba0d29b Mon Sep 17 00:00:00 2001
From: Dmitry <b4tm4n@mail.ru>
Date: Fri, 15 Oct 2021 14:53:20 +0300
Subject: [PATCH] + bench_converter

---
 tests/bench_converter.py | 105 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 tests/bench_converter.py

diff --git a/tests/bench_converter.py b/tests/bench_converter.py
new file mode 100644
index 0000000..ae4bdd4
--- /dev/null
+++ b/tests/bench_converter.py
@@ -0,0 +1,105 @@
+
+from typing import Iterable, List, Tuple, Union, Optional
+from uuid import uuid4
+import datetime
+from itertools import islice
+from dataclasses import dataclass
+import time
+import statistics
+import functools
+
+from sync_ics2gcal import CalendarConverter
+
+
+@dataclass
+class IcsTestEvent:
+    uid: str
+    start_date: Union[datetime.datetime, datetime.date]
+    end_date: Union[datetime.datetime, datetime.date, None] = None
+    duration: Optional[datetime.timedelta] = None
+    created: Union[datetime.datetime, datetime.date, None] = None
+    updated: Union[datetime.datetime, datetime.date, None] = None
+
+    @staticmethod
+    def _format_datetime(value: Union[datetime.datetime, datetime.date]):
+        result: str = ''
+        if isinstance(value, datetime.datetime):
+            result += f'DATE-TIME:{value.strftime("%Y%m%dT%H%M%SZ")}'
+        else:
+            result += f'DATE:{value.strftime("%Y%m%d")}'
+        return result
+
+    def render(self) -> str:
+        result: str = ''
+        result += 'BEGIN:VEVENT\r\n'
+        result += f'UID:{self.uid}\r\n'
+        result += f'DTSTART;VALUE={IcsTestEvent._format_datetime(self.start_date)}\r\n'
+        if self.end_date is not None:
+            result += f'DTEND;VALUE={IcsTestEvent._format_datetime(self.end_date)}\r\n'
+        else:
+            result += f'DURATION:P{self.duration.days}D\r\n'
+        if self.created is not None:
+            result += f'CREATED:{self.created.strftime("%Y%m%dT%H%M%SZ")}\r\n'
+        if self.updated is not None:
+            result += f'LAST-MODIFIED:{self.updated.strftime("%Y%m%dT%H%M%SZ")}\r\n'
+        result += 'END:VEVENT\r\n'
+        return result
+
+
+@dataclass
+class IcsTestCalendar:
+    events: List[IcsTestEvent]
+
+    def render(self) -> str:
+        result: str = ''
+        result += 'BEGIN:VCALENDAR\r\n'
+        for event in self.events:
+            result += event.render()
+        result += 'END:VCALENDAR\r\n'
+        return result
+
+
+def gen_test_calendar(events_count: int) -> IcsTestCalendar:
+    def gen_events() -> Iterable[IcsTestEvent]:
+        for i in range(10000000):
+            uid = f'{uuid4()}@test.com'
+            start_date = datetime.datetime.now() + datetime.timedelta(hours=i)
+            end_date = start_date + datetime.timedelta(hours=1)
+            event: IcsTestEvent = IcsTestEvent(
+                uid=uid, start_date=start_date, end_date=end_date, created=start_date, updated=start_date)
+            yield event
+
+    events: List[IcsTestEvent] = list(islice(gen_events(), events_count))
+    result: IcsTestCalendar = IcsTestCalendar(events)
+    return result
+
+
+test_calendar: IcsTestCalendar = gen_test_calendar(1000)
+ics_test_calendar: str = test_calendar.render()
+converter = CalendarConverter()
+converter.loads(ics_test_calendar)
+
+
+def bench(num_iters=1000):
+    def make_wrapper(func):
+        @functools.wraps(func)
+        def wrapper(*args, **kw):
+            times = []
+            for _ in range(num_iters):
+                t0 = time.perf_counter_ns()
+                result = func(*args, **kw)
+                t1 = time.perf_counter_ns()
+                times.append(t1 - t0)
+            best = min(times)
+            avg = round(sum(times) / num_iters, 2)
+            median = statistics.median(times)
+            print(
+                f'{func.__name__} x {num_iters} => best: {best} ns, \tavg: {avg} ns, \tmedian: {median} ns')
+            return result
+        return wrapper()
+    return make_wrapper
+
+
+@bench(num_iters=500)
+def events_to_gcal():
+    converter.events_to_gcal()