akovalenko/sbcl-win32-threads — Issue #16: degradation performance
Author: bach741974
Created: 2012-01-25 18:15:54+00:00
State: open

Win32, Win64

I see degradation performance in loop when add :from 0 :

CL-USER> (time (let ((n 1))

(loop :for i :from 0 :upto 500000000 :by n
:do
(* i 8))))
Evaluation took:
4.578 seconds of real time
4.578125 seconds of total run time (4.578125 user, 0.000000 system)
100.00% CPU
13,778,114,497 processor cycles
33,016 bytes consed

NIL
CL-USER> (time (let ((n 1))

(loop :for i :upto 500000000 :by n
:do
(* i 8))))
Evaluation took:
0.391 seconds of real time
0.390625 seconds of total run time (0.390625 user, 0.000000 system)
100.00% CPU
1,175,092,867 processor cycles
0 bytes consed

NIL
CL-USER>