https://gcc.gnu.org/bugzilla/show_bug.cgi?id=35339
Manfred Schwarb <manfred99 at gmx dot ch> changed:
What |Removed |Added
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CC| |manfred99 at gmx dot ch
--- Comment #10 from Manfred Schwarb <manfred99 at gmx dot ch> ---
As I understand this patch applies to read and write.
How does this optimization behave regarding my pet issue (short array reads)?
I.e.
program internalread
integer m
parameter(m=10000000)
character value*10
integer i,j,intvalues(m)
DO j=1,100
write(value,'(i3,a5)') j," 5 69"
CC read(value,*,end=20) (intvalues(i),i=1,m)
read(value,*,end=20) intvalues
20 print*,"20"
write(*,*) j,i
ENDDO
end program internalread
On my box this is 2.8s vs. 31s, i.e. the array version is more
than 10 times slower than the implied do loop.
