Test

all: improve memory usage #856

Job	Run time
Test with Go 1.18.10 on FreeBSD	2m 47s
Test with Go 1.19.13 on FreeBSD	2m 55s
Test with Go 1.18.x on ubuntu-latest	1m 2s
Test with Go 1.20.14 on FreeBSD	3m 6s
Test with Go 1.19.x on ubuntu-latest	50s
Test with Go 1.21.13 on FreeBSD	2m 58s
Test with Go 1.20.x on ubuntu-latest	1m 5s
Test with Go 1.22.6 on FreeBSD	2m 46s
Test with Go 1.21.x on ubuntu-latest	55s
Test with Go 1.23.0 on FreeBSD	2m 38s
Test with Go 1.22.x on ubuntu-latest	41s
Test with Go 1.23.x on ubuntu-latest	49s
Test with Go 1.18.x on macos-latest	40s
Test with Go 1.19.x on macos-latest	33s
Test with Go 1.20.x on macos-latest	35s
Test with Go 1.21.x on macos-latest	27s
Test with Go 1.22.x on macos-latest	29s
Test with Go 1.23.x on macos-latest	28s
Test with Go 1.18.x on windows-latest	49s
Test with Go 1.19.x on windows-latest	53s
Test with Go 1.20.x on windows-latest	1m 35s
Test with Go 1.21.x on windows-latest	1m 43s
Test with Go 1.22.x on windows-latest	1m 35s
Test with Go 1.23.x on windows-latest	54s
	33m 13s

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