hashcash benchmarks

As you know hashcash is faster on faster CPUs. But how much faster? This page tells you how many megahashes (1 megahash = 20 bits of collision) per second various bits of hardware old and cutting edge new can churn out. Please send in your benchmarks for processors.

With the new libfastmint code from Jonathan Morton, for x86 family processors there is assembler code using the MMX SIMD instructions and for PPC processors there is assembler code using the vector units. But also the C version that comes in libfastmint is a lot faster.

Run hashcash -sv and send me <adam@cypherspace.org> or send to the hashcash list your benchmark.

Go here for binaries for download.

Note some laptops can be configured to slow the processor down as a cooling method rather than spinning the fan (this gives slower performance when hot but makes it run quieter). If your laptop is setup like this you may get significantly slower benchmark results. (For example on toshiba tecra 8000 in the BIOS setting "cooling: quiet" gives 150Mhz when it is hot, and setting "cooling: performance" just spins the fan as required to cool and keeps running at 300Mhz). On windows a tool such as this MegaHertz can measure your actual CPU speed. Maybe there are better tools, but this appears to work.

The results

processor type color coding:

x86 compatible

power pc

unix RISC

megahashes/s	20-bit	clock	model	core
9.2 Mh/s	0.11s	2Ghz	ppc G5	altivec std 2x4
6.7 Mh/s	0.16s	2.13Ghz	core2 duo	mmx std 1x2
4.68 Mh/s	0.22s	2.2Ghz	athlon64 x2	mmx std 1x2
4.5 Mh/s	0.23s	2Ghz	core duo	mmx std 1x2
4.3 Mh/s	0.23s	1Ghz	ppc G4	altivec std 2x4
3.9 Mh/s	0.27s	3.6Ghz	P4 prescott	mmx std 1x2
3.72 Mh/s	0.28s	3.06Ghz	P4	mmx std 1x2
3.58 Mh/s	0.29s	1.75Ghz	semperon 2500+	mmx std 1x2
3.4 Mh/s	0.29s	2.18Ghz	athlon xp 2500+	mmx std 1x2
3.0 Mh/s	0.33s	667Mhz	ppc G4 7450	altivec std 2x4
3.0 Mh/s	0.34s	1.6Ghz	turion 64 mobile	mmx std 1x2
2.8 Mh/s	0.37s	1.67Ghz	athlon xp 2000+	mmx std 1x2
2.6 Mh/s	0.39s	1.4Ghz	celeron-M	mmx std 1x2
2.5 Mh/s	0.40s	1.53Ghz	athlon xp 1800+	mmx std 1x2
2.4 Mh/s	0.42s	2Ghz	P4	mmx std 1x2
1.67 Mh/s	0.6s	1.1Ghz	athlon xp 1300+	mmx comp 1x2
1.26 Mh/s	0.8s	750Mhz	amd duron	mmx std 1x2
1.12 Mh/s	0.93s	930Mhz	P3	ansi comp 1
1.05 Mh/s	0.99s	800Mhz	ppc G3 750FX	ansi comp 1
0.98 Mh/s	1s	666Mhz	alpha EV6	ansi std 1
0.96 Mh/s	1.1s	600Mhz	P3	mmx std 1x2
0.7 Mh/s	1.4s	400Mhz	ppc G3 750	ansi std 1
0.52 Mh/s	1.9s	466Mhz	celeron	ansi comp 1
0.51 Mh/s	2.0s	300Mhz	P2	mmx comp 1x2
0.43 Mh/s	2.3s	300Mhz	amd K6-2	mmx comp 1x2
0.33 Mh/s	3s	200Mhz	pentium	mmx std 1
0.21 Mh/s	4.9s	180Mhz	MIPS R10000	ansi std 1
0.021 Mh/s	48s	66Mhz	486dx	ansi comp 1
0.01 Mh/s	100s	25Mhz	486dx	ansi comp 1