Investigate memory usage and do perf profiling

[stianeklund]

• Are there any bad offenders?

• Review memory usage

• Any tasks that block more than they should?

• https://github.com/espressif/esp-idf/tree/master/examples/system/freertos/real_time_stats

• https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-guides/performance/index.html

[stianeklund]

W (28554205) CAT PARSER: Command handler for 'IF' returned error ESP ERR INVALID STATE

W (28554215) CAT PARSER: Error dispatching command 'IF00003573000 -999000011020010080':

ESP ERR INVALID STATE W (28554225) CAT PARSER: Error processing command block from UART: ESP_ERR_INVALID_STATE