ST marketing materials put STM8 Dhrystone performance at 0.29 DMIPS / Mhz. However, when actually compiling the Dhrystone benchmark with different C compilers optimizing for speed, the picture is a bit different:
Raisonance is at 0.289 DMIPS / Mhz and Cosmic at 0.296 DMIPS / Mhz, both very close to the 0.29 DMIPS / Mhz stated by ST. IAR outperforms them, and acheives 0.347 DMIPS / Mhz. All these numbers are from the comparison at http://colecovision.eu/stm8/compilers.shtml, which uses mid-2016 compilers. SDCC used to perform worse at Dhrystone: SDCC 3.5.0 from last year only achieves 0.151 DMIPS / Mhz. SDCC 3.6.0 was released on the 12th of June 2016 and improves this to 0.167 DMIPS / Mhz, still far worse than the other compilers. But current development versions of SDCC do much better: Revision #9652 is now at 0.355 DMIPS / Mhz. That means that SDCC went from worst to best in a very short time. Besides the huge improvement in Dhrystone scores, there was also a small reduction in Dhrystone code size. Philipp P.S.: Dhrystone was compiled using strong optimization for code speed: sdcc -mstm8 -c -DNOSTRUCTASSIGN --max-allocs-per-node 100000 --opt-code-speed ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports.http://sdm.link/zohodev2dev _______________________________________________ Sdcc-user mailing list Sdcc-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/sdcc-user
