xds router performance optimization #1951

Job	Run time
build agent and cache	3m 8s
download midwares and cache	8s
set-execution-conditions	10s
Test for spring (1.5.0.RELEASE, Edgware.SR2, 1.5.0.RELEASE)	14m 9s
Test for spring (2.0.2.RELEASE, Finchley.RELEASE, 4.1.3, 2.0.0.RELEASE)	17m 28s
Test for spring (2.1.0.RELEASE, Greenwich.RELEASE, 4.2.6, 2.1.0.RELEASE)	16m 23s
Test for spring (2.2.0.RELEASE, Hoxton.RELEASE, 4.3.6, 2.2.0.RELEASE)	16m 9s
Test for spring (2.3.0.RELEASE, Hoxton.RELEASE, 4.4.1, 2.2.8.RELEASE)	16m 28s
Test for spring (2.4.0, 2020.0.0, 4.5.6, 2021.0.1.0)	13m 48s
Test for spring (2.6.2, 2021.0.0, 4.5.10, 2021.1)	13m 27s
Test for spring (2.7.2, 2021.0.3, 4.5.13)	13m 14s
	2h 4m 32s

Provide feedback