I have relatively little experience with ECUs other than the ones that work with for my own cars (two so far), so a stupid question perhaps - what are the best reading and flashing times for custom written boot-mode software for ST10 based ME ECUs? Asking because for my ECU (ME7.9.10) which is 850K in flash size the theoretical limit at 115200 baud is about 1 minute (to just transmit the data), so far my software does it in 1.5 minutes for reading and just under 2 minutes for writing. I simply wonder if further fight to reduce these times has any chance of more improvement?

EDIT: and of course only after I asked I have seen the post a couple of lines below about MED flashing times. Apparently I can still improve it...

Can't seem to do higher than 115200 baud, on my Linux box the whole thing just refuses to communicate, not sure at which end though. On the other hand, after fixing a handful of comm related things on the PC side, I can now push in (flashing skipped) and pull out the whole file in 1:16. At this baud rate, the theoretical max is 1:14, so I am good here. Flashing takes additional 20 seconds or so on top the transmission time. Selective block writing I already had, only manual, CRC code based is indeed a better idea.

So I am left with the compression, since most time it would be the data block / segments writing, I am guessing a simple per word run length compression should do the trick?