tweak r89316 for summary(character()) #9600

Job	Run time
Windows (installer, intel)	24m 49s
Linux (gcc, debian:testing, arm)	33m 17s
Windows (check, arm)	52m 33s
Windows (installer, arm)	25m 5s
MacOS (macOS-15)	29m 46s
Linux (clang, debian:stable, intel)	37m 18s
Linux (gcc, debian:stable, arm)	32m 56s
Linux (clang, debian:stable, arm)	31m 48s
Linux (gcc, debian:stable, intel)	34m 7s
Windows (check, intel)	53m 50s
Linux (clang, debian:testing, arm)	34m 41s
Linux (clang, debian:testing, intel)	37m 16s
Linux (gcc, debian:testing, intel)	36m 10s
MacOS (macOS-15-intel)	1h 1m 45s
	8h 45m 21s

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