HP Paviilion du9700 Notebook PC
AMD Turion(tm) 64 X2 Mobile Technoloby TL-60
Memory: 2.00 GB
x=: 1e6 $ ' '
y=: a. {~ ? 1e6 $ 256
%/ 100 (6!:2)&> '/:~x' ; '/:~y'
1.01786
-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Roger Hui
Sent: Saturday, July 05, 2014 1:59 AM
To: Programming forum
Subject: [Jprogramming] sort times
I have observed a puzzling timing result which may be CPU dependent.
Please try the following and tell me what ratio you get, and the kind of
machine you ran it on. Thanks.
On my machine, an XPS L521X Intel Core i7-3632QM @ 2.2 GHz,
x=: 1e6 $ ' '
y=: a. {~ ? 1e6 $ 256
%/ 100 (6!:2)&> '/:~x' ; '/:~y'
2.44133
Basically, sorting a constant vector of 1-byte ints takes 2.4 times as long
as sorting a random vector of 1-byte ints.
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