Attention attracted ... [megasnip]
after stripping down the OS if there is enough rootfs available, consider disabling ubifs compression. AFAIK nobody has done it yet and there is speculation that it may increase performance
$ df -h rootfs 227.4M 132.3M 90.9M 59% / /home/opt 2.0G 429.6M 1.4G 22% /opt