map v/s rewrite performance

[Igor Sysoev]

On Mar 25, 2014, at 12:12 , rahul286 wrote:

> Hi All,
> 
> I am just wondering, say for 1000 url redirects, what will be more
> efficient.
> 
> Rewrite Style:
> ============
> server {
>       rewrite          old-url-1         new-url-1 permanent;
>       rewrite          old-url-2         new-url-2 permanent;
>       rewrite          old-url-3         new-url-3 permanent;
>       #....
>       rewrite $old-url-1000    $new-url-1000 permanent;
> }
> 
> 
> Map Style:
> ============
> 
> map $request_uri $new_uri {
>         default             $request_uri;
>         old-url-1          new-url-1;
>         old-url-2          new-url-2;
>         old-url-3          new-url-3;
>         #....
>         old-url-1000    new-url-1000;
> }
> 
> #and something like
> server {
>         try_files $new_uri =404;
> }
> 
> Since nginx is very fast, I am not able to notice any delay for around 20
> rewrites. :|
> 
> Is one of above 2 method is recommended for large number of rewrites?
> 
> I am inclined towards map, as rewrite adds plenty of notices logs. It's like
> every rewrite is checked for incoming requests unless it is surrounded by
> location.
> 
> Please let me know if more details are needed.

location = old-url-1 { return 301 new-url-1; }
...


-- 
Igor Sysoev
http://nginx.com