use RWMutex when no TTLs are used

Question

use RWMutex when no TTLs are used

raulk opened this issue 4 years ago · 3 comments

Segments are guarded by a sync.Mutex. If the user promises to not use TTLs at construction time (with an option), these locks could be changed to sync.RWMutex for increased throughput in read-predominant, highly concurrent workloads.

We could also stop tracking the access time entirely, which would allow us to pack more data in the same size, as well as squeeze a little bit more performance (time.Now() translates into a syscall).

Answer 1 · 2020-11-17T04:29:08.000Z

RWMutex may perform worse than Mutex if there is very little contention.

Answer 2 · 2021-09-24T09:24:48.000Z

RWMutex may perform worse than Mutex if there is very little contention.

Can u explain more about why RWMutex may perform worse than Mutex ?

Answer 3 · 2021-09-26T03:05:13.000Z

RWMutex may perform worse than Mutex if there is very little contention.

Can u explain more about why RWMutex may perform worse than Mutex ?

RWMutex does more work than Mutex for Lock operation.