[Bug fortran/82471] do-concurrent is much slower than ordinary-do!

[chinoune.mehdi at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82471

--- Comment #4 from Chinoune <chinoune.mehdi at hotmail dot com> ---
(In reply to Dominique d'Humieres from comment #3)

>  DO CONCURRENT :    8.19799995    
>  DO CONCURRENT :   0.284000009    
>  ORDINARY DO   :   0.116000004    
>  ARRAY DO      :   0.118000008    

but with me it gives :
MinGW:
 DO CONCURRENT 1 :    11.1880007
 DO CONCURRENT 2 :   0.140000001
   ORDINARY DO   :   0.157000005
    ARRAY DO     :   0.156000003
Ubuntu:
 DO CONCURRENT 1 :    11.5040007
 DO CONCURRENT 2 :   0.146000013
   ORDINARY DO   :   0.144000009
    ARRAY DO     :   0.143000007