On Tuesday, December 26, 2017 at 9:53:09 AM UTC-5, nospam wrote:
In article , harry newton
wrote:

There are very many posts where people complain incessantly that each
successive iOS release slows down their phone drastically.

the reason is because after a new ios upgrade, the system is rebuilding
caches, reindexing files, etc.

performance will improve after the caches are rebuilt, and more so
after all of the background processing is complete, at which point,
everything is back to normal.

except that the (inaccurate) first impressions remain. nobody checks
the performance a week later.

I've had a lot of phones and I've never seen one speed up a week after an os install or factory reset. Sounds like any excuse will do.