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B Program Speed Records

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THE FASTEST PI PROGRAMS
that will run on your PC

SOME OF THE DATA BELOW IS OUT OF DATE
BUT REMAINS FOR COMPARISION
THE "EFFICIENCY" IS RELATIVELY ACCURATE
SOME OF THE OTHER DATA MAKES
LITTLE SENSE

Consult the chart below for the programs by
Steve Pagliarulo, Xavier Gourdon, Takuya Ooura,
Carey Bloodworth, Mikko Tommila, Sebastian Wedeniwski,
Alan Pittman, Gio Ciampa, Yasumasa Kanada, and
Alexander J. Lee.

THE BENCHMARK COMPUTER
My AMD Athlon 3800+ 64 X2
with 1.0 Gig RAM is the standard
using Windows XP (32 bit OS)
at approx. 2 Ghz
your times will vary accordingly
(see disclaimer)

Stu's world ranking

Program

Author

131,072
digits

1,048,576
digits

Effic-
iency

16-meg digits

Maximum digits

Programming Comments

#1 (1Meg only)
QuickPi v. 4.5 Steve Pagliarulo 2.03 secs.
1.000
59.61 secs. 70-gig
Based on Chudnovskys' algorithm, with other algorithms included, also calculates sqrt-2 and e

#1 (above 16Meg)
y-cruncher v0.5.4.9148(fix 1) Alexander Yee 2.409 secs.
1.19
48.95 secs. 5 TB or more
Based on Chudnovskys' algorithm, with other algorithms included, also calculates sqrt-2 and e

#3
PiFast.EXE ver 4.4 Xavier Gourdon 3.13 secs.
1.542
87.95 secs. 25 gigs
Based on Chudnovskys' algorithm, disk swap version - can do calc. in different time chunks, also will calculate a whole host of other user defined constants, incl. 'e'

#4
ChudFFTw.EXE ver 1.5 Mark Larson 3.84 secs 36 secs.
4.12
n/a 4 megs
Based on Chudnovsky's binary splitting, but falls short of 1 meg by 105 digits, using standard FFT techniques, basically a tweaking of Alan Pittman's chud.EXE(ahppi2b)

#5
APTEST.EXE (g5) Mikko Tommila 4 secs. 44 secs.
5.04
1,179 113M/226M Part of Tommila's large integer package, also does pi in base 2 to 36

#6 (tie)
PI_CSS6.EXE Takuya Ooura 2 53 secs.
6.07
1,687 67M Based on FFT and AGM, programmed as a benchmark of a FFT based multiple-precision routine. Standard version - FFT radix 8,4,2.

#6 (tie)
chud.EXE(ahppi2b) Alan Pittman 7 secs 53 secs.
6.07
n/a 4Meg Based on Chudnovsky's binary splitting, but falls short of 1 meg by 105 digits, using standard FFT techniques.

#8
Piologie_zip.zip
ver. 1.3 Sebastian Wedeniwski 6.21 secs. 73.49 secs.
8.42
n/a 8 megs Based on Piologie, a library for arbitrary precision arithmetic, also calculates exp(1), zeta(3), gamma, ln(2)

#9
PI 2.3.1c - Hartley speed version - also large-digit run version which did 1-gig digits Carey Bloodworth 7 98 secs.
pi.ini set to 256m memory, 256k cache, 128k buffer to match my system
11.23
2,815 1G (confirmed), perhaps 2G speed record using the Fast Hartley Transform version
see docs for description of all program versions.

#10
PI4.EXE Gio Ciampa 27 secs.
13.003
n/a 2M Based on code from Takuya Ooura at the U of Tokyo. Pi4.exe uses a Fast FFT with radix 4, 2

#11
SUPER_PI.EXE Yasumasa Kanada 14 secs. 45.25 secs.
22.290
33M Based on the program which set the super computer record at 206,158,430,000 digits in Sept 1999

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Stu's world ranking	Program	Author	131,072 digits	1,048,576 digits	Effic- iency	16-meg digits	Maximum digits	Programming Comments
#1 (1Meg only)	QuickPi v. 4.5	Steve Pagliarulo		2.03 secs.	1.000	59.61 secs.	70-gig	Based on Chudnovskys' algorithm, with other algorithms included, also calculates sqrt-2 and e
#1 (above 16Meg)	y-cruncher v0.5.4.9148(fix 1)	Alexander Yee		2.409 secs.	1.19	48.95 secs.	5 TB or more	Based on Chudnovskys' algorithm, with other algorithms included, also calculates sqrt-2 and e
#3	PiFast.EXE ver 4.4	Xavier Gourdon		3.13 secs.	1.542	87.95 secs.	25 gigs	Based on Chudnovskys' algorithm, disk swap version - can do calc. in different time chunks, also will calculate a whole host of other user defined constants, incl. 'e'
#4	ChudFFTw.EXE ver 1.5	Mark Larson	3.84 secs	36 secs.	4.12	n/a	4 megs	Based on Chudnovsky's binary splitting, but falls short of 1 meg by 105 digits, using standard FFT techniques, basically a tweaking of Alan Pittman's chud.EXE(ahppi2b)
#5	APTEST.EXE (g5)	Mikko Tommila	4 secs.	44 secs.	5.04	1,179	113M/226M	Part of Tommila's large integer package, also does pi in base 2 to 36
#6 (tie)	PI_CSS6.EXE	Takuya Ooura	2	53 secs.	6.07	1,687	67M	Based on FFT and AGM, programmed as a benchmark of a FFT based multiple-precision routine. Standard version - FFT radix 8,4,2.
#6 (tie)	chud.EXE(ahppi2b)	Alan Pittman	7 secs	53 secs.	6.07	n/a	4Meg	Based on Chudnovsky's binary splitting, but falls short of 1 meg by 105 digits, using standard FFT techniques.
#8	Piologie_zip.zip ver. 1.3	Sebastian Wedeniwski	6.21 secs.	73.49 secs.	8.42	n/a	8 megs	Based on Piologie, a library for arbitrary precision arithmetic, also calculates exp(1), zeta(3), gamma, ln(2)
#9	PI 2.3.1c - Hartley speed version - also large-digit run version which did 1-gig digits	Carey Bloodworth	7	98 secs. pi.ini set to 256m memory, 256k cache, 128k buffer to match my system	11.23	2,815	1G (confirmed), perhaps 2G	speed record using the Fast Hartley Transform version see docs for description of all program versions.
#10	PI4.EXE	Gio Ciampa		27 secs.	13.003	n/a	2M	Based on code from Takuya Ooura at the U of Tokyo. Pi4.exe uses a Fast FFT with radix 4, 2
#11	SUPER_PI.EXE	Yasumasa Kanada	14 secs.	45.25 secs.	22.290		33M	Based on the program which set the super computer record at 206,158,430,000 digits in Sept 1999