Data logging using Velodyne Puck VLP-16 and ROS Driver with Raspberry Pi 3

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Good day,

I would just like to ask if there is anyone with experience in trying to use the ROS velodyne driver for vlp-16 in datalogging with a Raspberry Pi 3. I tried to code a simple program to store the velodyne points collected from the subscribed velodyne topic. I would dump the each 360 sweep (X, Y, Z, Intensity, Ring number and Azimuth) in a text file. I was only able to get a sampling rate of every 3 seconds for each frame.

Is there anyone able to record data from the Lidar at the rated 10Hz? Thank you.