precise timing with rosbag or an alternative

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The beginner's tutorial reads, that rosbag may be not precise when it comes to the timing. Some tasks I face are not Lyapunov stable, so precise data playback is necessary.

1) Could rosbag be precise with the usage of advanced technical hacks? E.g. RAM-disk as a bag file destination and dedicated CPU core for recording/playing. Are there any ROS directives/modes for precise timing?

2) Are there alternative means of recording and playing messages and requests/responses with precise timing (95% <1ms)? Unfortunately, some non-trivial data like camera output might be involved.

For simplicity let's assume we work with a single machine to avoid network latency issues.

ROS Kinetic, Ubuntu 16.04.05 x64.