tracing.py 文件源码

def start(self, options: dict = None, **kwargs: Any) -> None:
        """Start."""
        options = options or dict()
        options.update(kwargs)
        categoriesArray = [
            '-*', 'devtools.timeline', 'v8.execute',
            'disabled-by-default-devtools.timeline',
            'disabled-by-default-devtools.timeline.frame', 'toplevel',
            'blink.console', 'blink.user_timing', 'latencyInfo',
            'disabled-by-default-devtools.timeline.stack',
            'disabled-by-default-v8.cpu_profiler',
        ]

        if 'screenshots' in options:
            categoriesArray.append('disabled-by-default-devtools.screenshot')

        self._path = options.get('path', '')
        self._recording = True
        await self._client.send('Tracing.start', {
            'transferMode': 'ReturnAsStream',
            'categories': ','.join(categoriesArray),
        })