[FS#510] slow sysupgrade

[LEDE Bugs]

The following task has a new comment added:

FS#510 - slow sysupgrade
User who did this - Arjen de Korte (arjendekorte)

----------
In a typical file system most files will be much smaller than 64 KB (and even smaller than 4 KB). When you need to reclaim the size of a smaller file that was erased (for instance, when updating a configuration file), you typically won't have to erase 64 KB.
----------

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=510#comment3420