[PD] bang when phasor~ reaches 1

[padawan12]

Cool! We've discovered something "very wrong".

Here I get 

number     bcalc        ecalc        bcplx        ecplx
--------------------------------------------------------
4          70           80           110          290
8          140          160          210          560
16         260          330          430          1130
32         560          660          1070         2300
64         1220         1490         3250         4720


with 0.39r4 on
$ cat /proc/cpuinfo
processor       : 0
vendor_id       : CentaurHauls
cpu family      : 6
model           : 7
model name      : VIA Samuel 2
stepping        : 3
cpu MHz         : 533.507
cache size      : 64 KB
fdiv_bug        : no
hlt_bug         : no
f00f_bug        : no
coma_bug        : no
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu de tsc msr cx8 mtrr pge mmx 3dnow
bogomips        : 1052.67


On Sat, 2 Dec 2006 17:07:28 +0100
Frank Barknecht <fbar at footils.org> wrote:

> Hallo,
> padawan12 hat gesagt: // padawan12 wrote:
> 
> > Is it just me though or is [expr ] really slow? I try to avoid it
> > because almost every patch that uses [expr] on my machine runs about
> > 50% slower than the equivilent arithmetic using atomic ops. 
> 
> Attached is a simple benchmark patch, which benchmarks taking the
> inverse in e/b-calc. Here builtin and expr are almost the same speed,
> builtin is only slightly faster.
> 
> However as soon as you collect longer chains of calculations into one
> expr-object it beats the crap out of atomic ops, as the e/b-complex
> benchmark shows. If it doesn't pulp the atomic ops in your Pd
> installation, then there's something very wrong. ;)
> 
> Ciao
> -- 
>  Frank Barknecht                 _ ______footils.org_ __goto10.org__
>