Test

Optimize the code. #156

Job	Run time
utest-regression-blackbox-test	2m 26s
cygwin64-cache	4m 58s
multiple-arch-aarch64	9m 59s
multiple-arch-armv7	9m 32s
fast	1s
cygwin64	6m 35s
build-ubuntu20	1m 55s
build-cross-arm	3m 31s
build-cross-aarch64	4m 13s
build-centos7	1m 37s
build-ubuntu16	1m 48s
build-ubuntu18	1m 46s
coverage	2m 14s
multiple-arch-amd64	1m 43s
test-done	0s
	52m 18s

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