Ferret talk - Jun 2007 - Highlight slowness

Has anyone else found that using ferret''s highlighting slows searches
down significantly?  I am seeing that it more than doubles the search
time on my system.  I am returning up to 500 results at once, so the
slow down is quite noticeable (probably adding about .7 seconds for
searches with large result sets.)
   --Paul

-- 
Posted via http://www.ruby-forum.com/.

Paul Lynch wrote:
> Has anyone else found that using ferret''s highlighting slows
searches
> down significantly?  I am seeing that it more than doubles the search
> time on my system.  I am returning up to 500 results at once, so the
> slow down is quite noticeable (probably adding about .7 seconds for
> searches with large result sets.)
>    --Paul
Are you using lazy loading? If so the problem might be that you are not 
loading anything from your database when doing non-highlight searches 
(good! fast), but you are when you do a highlight search (bad! slow)

Or that might not have anything to do with it, I''m still learning
ferret
and rails.

See this post:

http://www.ruby-forum.com/topic/111027#264368

Jesse

-- 
Posted via http://www.ruby-forum.com/.

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-- 
Posted via http://www.ruby-forum.com/.

Paul Lynch wrote:
> Has anyone else found that using ferret''s highlighting slows
searches
> down significantly?  I am seeing that it more than doubles the search
> time on my system.  I am returning up to 500 results at once, so the
> slow down is quite noticeable (probably adding about .7 seconds for
> searches with large result sets.)
>    --Paul
Hello Paul,

I got the same problem.

highlighting performance are based on the tolerance you selected.
Example  for me :

QUERY~1 is fast.  < 10 ms
QUERY~0.9 is slower. < 50 ms
QUERY~0.8 is slow. = 1 sec
QUERY~0.7 is very slow. > 2 sec
...

If anyone have a solution to speed it up, i would appreciate too.

-- 
Posted via http://www.ruby-forum.com/.

Here how i do highlighting


in my model :
acts_as_ferret :fields => { :content => {:store => :yes}, :title  =>
{:store => :yes}}

results = list.find_by_contents("QUERY~7", options)


In my view :
<% results[0].highlight("QUERY~7", :field => :content,... )
-%>

Is there a way to make it faster without changing the tolerance factor ? 
( ~7 in this example )


-- 
Posted via http://www.ruby-forum.com/.

On Tue, Jul 03, 2007 at 07:02:26PM +0200, Landanger Pierre-Yves
wrote:
> Here how i do highlighting
> 
> 
> in my model :
> acts_as_ferret :fields => { :content => {:store => :yes}, :title 
=>
> {:store => :yes}}
> 
> results = list.find_by_contents("QUERY~7", options)
> 
> 
> In my view :
> <% results[0].highlight("QUERY~7", :field => :content,... )
-%>
> 
> Is there a way to make it faster without changing the tolerance factor ? 
> ( ~7 in this example )
I could imagine that doing the highlighting right inside
find_by_contents could speed up things quite a bit, maybe something like:

results = list.find_by_contents("QUERY~7", :highlight => { :field
=> :content })

I''d happily apply a patch for this, or just file it as a feature
request
in aaf''s Trac ;-)

Jens

-- 
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