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Item6273: "This topic does not exist" page can takes a long time to load

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In large webs, it can take a Long Time to load the "this topic does not exist" page for a nonexistent topic

Example: in a web with 20,000 topics at my company: 35 seconds to return and load the "topic does not exist" template

Comparison: It takes about 6 seconds to return and load an existing page

Comparison: smaller web (roughly 1500 pages): 6 seconds to return and load the "topic does not exist" template

Investigation indicates that the time is being taken up by the calculation of the "list of similar topics" that appears on that page. Populating that list takes a long time on large webs.

I think TWiki is over-optimizing as the "list of similar topics" isn't visib;le unless/until the user clicks the "==> List more similar topic in this web" link? Could we postpone calculating the list of similar topics until the user clicks for it?

When a page takes a long time to load - it makes for a poor user experience - people decide that TWiki is "slow" - the likelihood that the user will click reload increases - the chance of the server going down increases frown

-- TWiki:Main/VickiBrown - 05 Jun 2009

Vicki, this is good observation. we should raise the proposal to "List more similar topic in this web" link button somewhere

-- TWiki:Main.SopanShewale - 05 Jun 2009

Agreed, is a usability issue for large webs. On the other side, quickly navigating to a page if you remember part of the name is a useful feature. I would not like to miss this feature, or have one more click to navigate to a page I need.

So, IMHO best solution is to have behavior selectable by the admin.

-- TWiki:Main.PeterThoeny - 08 Jun 2009

Summary "This topic does not exist" page can takes a long time to load
ReportedBy TWiki:Main.VickiBrown
Codebase 4.2.4
SVN Range TWiki-5.0.0, Sat, 18 Apr 2009, build 18024
AppliesTo Engine

Priority Normal
CurrentState New


TargetRelease n/a

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Topic revision: r3 - 2009-06-08 - PeterThoeny
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