Linux - Raspberry pi 3 twice as fast as zero

I always assumed that the raspi's were fast enough to take anything I threw at them.  Wrong!  The p3 can sample 2 accelerometers at 30 samp/sec, and the zero at about 15.  That's probably enough for a velocity seismometer running below 10 Hz.  All the damage comes at 1 to 2 Hz anyway.  So, I envision a bunch of zeros running these.  I have to wait until I can actually buy them.  I've used up my 'one to a customer'.  They still make them in fairlyland Wales, but they use robots.  Speed it up, boys!