[RCU] Slow displaying INBOX with thousands emails

Matthew Broadhead matthew.broadhead at nbmlaw.co.uk
Sat Oct 27 18:51:10 CEST 2018

in my experience roundcube is slow with a large inbox (or any large 
mailbox).  searching is also slow.  it can even seem to crash at times.  
i am using dovecot as my imap server.
i will see if i can also provide debug output

On 27/10/2018 17:30, A.L.E.C wrote:
> On 10/27/18 12:01 PM, Alexey wrote:
>>> So, you're showing the imap server timings. Note the response need to
>>> be sent and parsed by the client.
>> Yes, and since my client is roundcube I wrote to this maillist, to solve this performance
>> issue.
> I'm just pointing out that e.g. a slow connection can cause the issue, so this don't have
> to be Roundcube's fault. Is the IMAP server on the same host? What PHP version? What
> Roundcube version?
>>> hint: you can set $config['performance_stats'] = true
>> mail [1.2 МБ/1.5 МБ]: 0.1386 sec
>> mail/getunread [929 КБ/997 КБ]: 0.0092 sec  (it's probably for showing counters in folders
>> tree)
>> mail/list [1.3 МБ/52 МБ]: 1.0174 sec
> Here I see that list request takes 1 second. So, where's your 5-7?
> ps. If you provide full debug log with THREAD and SORT responses I might take a look at
> the code and see how performant is the parsing code and if there's any culprit. Also,
> please be consistent/precise, first you say 5-7 seconds, then 3.5s and now I see 1 second.

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