esp_now latency for consecutive points broadcast to slave

[darylthomas]

I am sending multiple values to a slave esp using esp_now broadcast. I am sending points at a frequency of 1 every 30ms and above. For the first few points the slave receives the message within 5 to 7ms. but for certain subsequent points it goes upto to 50ms and even 100ms

esp32 speedtests.xlsx

Point SentTime ReceivedTime ExecutedTime SlaveReceivedTime SlaveExecutedTime CommunicationTime TotalExecutionTime SlaveCommunicationTime SlaveTotalExecutionTime
5 1711798622.65379 1711798622.66174 1711798622.66286 1711798622.67827 1711798622.67946 7.95 9.07 15.41 16.6
6 1711798622.69424 1711798622.70244 1711798622.70363 1711798622.72855 1711798622.7297 8.2 9.39 24.93 26.07
7 1711798622.73481 1711798622.74294 1711798622.74411 1711798622.78723 1711798622.78854 8.13 9.3 43.13 44.43
8 1711798622.77513 1711798622.78358 1711798622.78472 1711798622.83769 1711798622.83887 8.46 9.59 52.97 54.16
9 1711798622.81556 1711798622.82401 1711798622.82515 1711798622.88931 1711798622.8906 8.45 9.59 64.15 65.45
10 1711798622.85593 1711798622.86431 1711798622.86551 1711798622.94036 1711798622.94153 8.38 9.57 74.86 76.03
11 1711798622.89636 1711798622.90404 1711798622.90528 1711798622.99113 1711798622.99247 7.69 8.92 85.86 87.19
12 1711798622.9367 1711798622.945 1711798622.94616 1711798623.04216 1711798623.04331 8.31 9.46 96.0 97.16
13 1711798622.97704 1711798622.98467 1711798622.98596 1711798623.09191 1711798623.09301 7.63 8.92 105.96 107.06
14 1711798623.01738 1711798623.02585 1711798623.02706 1711798623.14438 1711798623.14561 8.47 9.68 117.32 118.55
15 1711798623.05784 1711798623.06586 1711798623.06703 1711798623.19467 1711798623.1958 8.02 9.19 127.64 128.77
Above is a sample of the values
The max latency is gong upto 200ms and avg of 50 ms over 37 points sent.
Max 14.1 15.01 195.41 196.41
Average 9.820526316 10.88184211 51.68578947 52.79973684
What could be causing this latency in between? Is there a threshold for difference between intermediate points?

[MicroController]

What could be causing this latency in between?

All sorts of things. Non-perfectly synchronized clocks for your time measurement, for example; or limited granularity of the clock(s).
Or unintended delays in the way received messages are handled/timed. Or just busy airwaves on the channel you're using. Or something different.