Some totally unscientific numbers - got my 4GB RAM pi4 and compared it with a pi3 - both using wifi running weewx 3.9.2 in simulator mode, and both in Flirc cases. Weewx was in debug mode with pyephem installed via pip. Both systems have identical newly flashed A1 SD cards. The pi4 uses a CanaKit pi4 power adaptor, the pi3 uses an old Aukey one I had sitting around.
Temperatures: - ambient = 21 C - pi3 = 37 C - pi4 = 44 C (it ran about 6 C or more hotter outside the case) Speed to do weewx things - initial run of Seasons report: - pi3 = 6.58 seconds to generate 57 images, 3.62 seconds to generate 8 files - pi4 = 3.44 seconds to generate 57 images, 1.66 seconds to generate 8 files And the next run of the Seasons report - pi3 = 4.45 seconds to generate 42 images, 1.26 seconds to generate 8 files - pi4 = 2.28 seconds to generate 42 images, 0.68 seconds to generate 8 files And the next run after that - pi3 = 1.00 seconds to generate 14 images, 1.26 seconds to generate 8 files - pi4 = 0.65 seconds to generate 14 images, 0.65 seconds to generate 8 files So the pi4 is definitely faster, nominally twice as fast or so for running the Seasons skin. Might be worth thinking about if you're a heavy user of your existing pi. Power draw comparisons: - pi3 = 1.6 W - pi4 = 3.1 W <= with great compute goes great power requirements :-) I also tried a couple SSD disks via USB3 enclosures. One a laptop SSD drive, one a M2 SSD drive from a NUC. Both worked great. Both increase the power needed by about 1.5 W according to a Kill-a-watt. -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/b48ce750-8468-4dc0-9dfd-e8d0b4f50e4d%40googlegroups.com.
