[Buildbot] #2982: Big logs are very slow for being displayed

[Buildbot trac]

#2982: Big logs are very slow for being displayed
---------------------+-------------------
Reporter:  Ben       |      Owner:
    Type:  defect    |     Status:  new
Priority:  critical  |  Milestone:  0.9.0
 Version:  master    |   Keywords:  web
---------------------+-------------------
 It freezes for 20 seconds ...

 The gap is between the following requests:

 /api/v2/builders/16/builds/1
 /api/v2/builders/16/builds/1/steps/0
 /api/v2/builders/16/builds/1/steps/0/logs/stdio
 /api/v2/logs/859
 ---[20 secs.]----
 /sse/listen
 /scripts.js.map
 /sse/add/174cc613-ba48-4912-8299-0e606c60c482/builders/16/builds/1/steps/0/logs/stdio/*
 /sse/add/174cc613-ba48-4912-8299-0e606c60c482/logs/859/*
 /api/v2/logs/859/contents?limit=51&offset=9396

 This is the response to the log request:
 {{{
 {"logs":[{"complete":false,"logid":859,"name":"stdio","num_lines":9447,"slug":"stdio","stepid":993,"type":"s"}],"meta":{}}
 }}}

 I can provide more information on request ...

--
Ticket URL: <http://trac.buildbot.net/ticket/2982>
Buildbot <http://buildbot.net/>
Buildbot: build/test automation