There's going to be jitter based on your building "resist" insulation in addition to clock jitter. (Esp for non Internet connected) And your hvac sizing and pl

There's going to be jitter based on your building "resist" insulation in addition to clock jitter. (Esp for non Internet connected) And your hvac sizing and plumbing efficiency determines the jitter too, where there is typically a minimum compressor on and off time of 300s, but the runtime is determined by how quickly it can get to the setpoint. Ecobees whave automatic "staging" configuration, but can be set manually to have have more or less setpoint responsiveness and over cool Max by .5 degree increments