search

bitbank2 / JPEGDEC

An optimized JPEG decoder for Arduino
Apache License 2.0
366 stars 47 forks source link

ESP32-S2 performance test #1

Closed timonsku closed 3 years ago

timonsku commented 3 years ago

Hey, awesome library! I just ran a quick test of the perf example on the ESP32-S2 if you want to add that to your benchmark table. As a suggestion, maybe make it a markdown table then it can be expanded in the future from other users via a PR :) My results (@240Mhz):

full sized decode in 202974 us
half sized decode in 167798 us
quarter sized decode in 46320 us
eighth sized decode in 38632 us
bitbank2 commented 3 years ago

Hi Timon, Glad you like it and thanks for giving it a try. I appreciate you running the test. I have an ESP32-S2. I didn't add the ESP32-S2 to my table because it performs worse than the original ESP32, so I thought that wasn't worth highlighting. I'll add your numbers. I'm not sure I want to keep a running tally. The table was just to give people a general idea of the performance they would see.

timonsku commented 3 years ago

The ESP32 is a dual core LX6, the S2 is a single core LX7. It is marketed as considerably slower thats why I found it interesting to see how much in this case :) Fair enough if you don't want more results. I just felt some people might be looking specifically for image decoding performance (like me) and want some pointers as to which MCU to choose.

bitbank2 commented 3 years ago

That's an interesting point about using the perf numbers to choose an MCU. I hadn't considered that.