> Begin forwarded message:
>
> From: Pietro Gagliardi
> Subject: Re: [go-nuts] Correct use of Mutex
> Date: October 3, 2016 at 4:22:34 PM EDT
> To: a...@cpu.host
>
> Why are you locking on the map key?
>
>> On Oct 3, 2016, at 2:53 PM, a...@cpu.
type Foo struct {
sync.RWMutex
data map[string]bool
}
o := &Foo{}
o.Lock()
o.data[i] = true
o.Unlock()
elsewhere
o.RLock()
v := o.data[i]
o.RUnlock()
On Mon, Oct 3, 2016 at 11:55 AM wrote:
>
> Which is correct?
>
> o.Lock()
> o.data[i] = true
> o.Unlock()
>
> or
>
> o.Lock()
> i.RLoc
Which is correct?
o.Lock()
o.data[i] = true
o.Unlock()
or
o.Lock()
i.RLock()
o.data[i] = true
i.RUnlock()
o.Unlock()
The latter actually seems to help high contention R/W operations on a very
large map according to the guy in my team who was working on the problem,
but I would have thought t
