It’s battle time! Some of you may have heard that Raspberry Pi 2 is out with more punch than ever. Just how much more? Well, apt-get dist-upgrade went about 5 times faster with the new Pi. With 1 GB of RAM and four cores, this will definitely be a boost for my home SSH box ergonomics over the previous version.
But what about hacking? There has been a lot of interest in getting Gpio benchmarks for the Pi 2 similar to my earlier Raspberry Pi GPIO benchmark. Well here it is! Please refer to the earlier article for source code and nice screenshots of square waves, as I’ll concentrate on the performance difference only here. You can also get the code from Github:
https://github.com/jokkebk/rpi-gpio-benchmark
Summary of results
All the Pi 1 benchmarks were ran 14th and 15th February 2015 using latest versions of the libraries as stated in my updated benchmark post. Pi 2 benchmarks were all run 25th and 26th March 2015 with the latest versions. If you get significantly different results at a later date, please let me know and I’ll update the table!
| Language | Library | Pi 1 | Pi 2 | Change |
|---|---|---|---|---|
| Shell | /proc/mem access | 2.8 kHz | 7.0 kHz | 2,5x |
| Shell / wiringPi | WiringPi gpio utility | 40 Hz | 95 Hz | 2,4x |
| Python | RPi.GPIO | 70 kHz | 243 kHz | 2,5x |
| Python | wiringpi2 bindings | 28 kHz | 103 kHz | 3,7x |
| Ruby | wiringpi bindings | 21 kHz | N/A | 3,7x |
| C | Native library | 22 MHz | 41.7 MHz | 1,9x |
| C | BCM2835 | 5.4 MHz | 7.2 MHz | 1,3x |
| C | WiringPi normal GPIO wiringPiSetup() | 4.1 MHz | 9.3 MHz | 2,3x |
| C | WiringPi GPIO wiringPiSetupGpio() | 4.6 MHz | 9.4 MHz | 2x |
| C | WiringPi sys wiringPiSetupSys() | 120 kHz | 185 kHz | 1.5x |
| Perl | BCM2835 | 48 kHz | 154 kHz | 3.2x |
Continue reading: Raspberry Pi 2 vs. 1 GPIO Benchmark
This post first appeared on Code And Life – Programming, Electronics And Oth, please read the originial post: here
