Before I get too far into testing a camera, I do a series of exposures calculated to see if there are self-heating effects that might skew my test results. Since many of my tests involve making series of sequential exposures that are later subjected to statistical analysis, material self heating can force me to slow down my testing.
I made 60 exposures in single shot drive mode with the lens cap on the shutter at 1/8000 second and the ISO set to 25K. Here is the standard deviation of three of the raw channels in the central 90% of the image, for each exposure:
The dotted line is a least-squares fit of a straight line to the green data.
There is no evidence of self-heating.