Rclone mount gets slower progressively

What is the problem you are having with rclone?

rclone mount becomes quite slow over a short period of time...

What is your rclone version (output from rclone version)

rclone v1.51.0
- os/arch: linux/arm
- go version: go1.13.7

Which OS you are using and how many bits (eg Windows 7, 64 bit)

Raspbian - Debian Buster 32-bit.

Which cloud storage system are you using? (eg Google Drive)

Google Drive

The command you were trying to run (eg rclone copy /tmp remote:tmp)

ExecStart=/usr/bin/rclone mount \
        --config=/home/pi/.config/rclone/rclone.conf \
        --read-only \
        --allow-other \
        --buffer-size 256M \
        --dir-cache-time 1000h \
        --poll-interval 15s \
        --timeout 1h \
        -v --log-file /opt/media.log \
        --rc --rc-addr 127.0.0.1:5573 \
        media:/ /mnt/media

A log from the command with the -vv flag (eg output from rclone -vv copy /tmp remote:tmp)

You haven't included a debug log.

There's nothing in the info logs. Wasn't able to test with debug.

Test with debug and please share the log.