Reuse TCP connection with LAVA labs that use REST API

[chaws]

Can LAVA re-use TCP connection?

[2022-07-07 02:23:06 +0000] [DEBUG] tf.validation.linaro.org: Retrieving result summary for job: 866847
[2022-07-07 02:23:06 +0000] [DEBUG] Starting new HTTPS connection (1): tf.validation.linaro.org:443
[2022-07-07 02:23:07 +0000] [DEBUG] https://tf.validation.linaro.org:443 "POST //RPC2 HTTP/1.1" 200 197
[2022-07-07 02:23:07 +0000] [DEBUG] tf.validation.linaro.org: requesting results for 0_interactive_uart0_6 with offset of 0
[2022-07-07 02:23:07 +0000] [DEBUG] Starting new HTTPS connection (1): tf.validation.linaro.org:443
[2022-07-07 02:23:08 +0000] [DEBUG] https://tf.validation.linaro.org:443 "POST //RPC2 HTTP/1.1" 200 298
[2022-07-07 02:23:08 +0000] [DEBUG] tf.validation.linaro.org: requesting results for 0_interactive_uart0_5 with offset of 0
[2022-07-07 02:23:08 +0000] [DEBUG] Starting new HTTPS connection (1): tf.validation.linaro.org:443
[2022-07-07 02:23:09 +0000] [DEBUG] https://tf.validation.linaro.org:443 "POST //RPC2 HTTP/1.1" 200 299
[2022-07-07 02:23:09 +0000] [DEBUG] tf.validation.linaro.org: requesting results for 0_interactive_uart0_4 with offset of 0
[2022-07-07 02:23:09 +0000] [DEBUG] Starting new HTTPS connection (1): tf.validation.linaro.org:443
[2022-07-07 02:23:09 +0000] [DEBUG] https://tf.validation.linaro.org:443 "POST //RPC2 HTTP/1.1" 200 299
[2022-07-07 02:23:09 +0000] [DEBUG] tf.validation.linaro.org: requesting results for 0_interactive_uart0_3 with offset of 0

Problem

The interaction above took ~3s to complete, could it be improved by re-using the same connection?

Solution

Use sessions to connect to LAVA using REST API
Keep-Alive: timeout=5, max=100
s = requests.Session()
s.get("https://")
https://requests.readthedocs.io/en/latest/user/advanced/?highlight=keep%20alive#keep-alive
Will probably do the same for squad-client and squad