introduce accumulator #30

Job	Run time
ubuntu-latest/java 8-spark-3.4/rust	5m 49s
ubuntu-latest/java 8-spark-3.2/java	48m 12s
macos-14(Silicon)/java 8-spark-3.4/rust	4m 28s
ubuntu-latest/java 8-spark-3.4/java	46m 16s
ubuntu-latest/java 8-spark-3.3/java	47m 38s
ubuntu-latest/java 11-spark-3.4/rust	5m 53s
macos-14(Silicon)/java 8-spark-3.4/java	35m 55s
ubuntu-latest/java 11-spark-3.3/java	50m 5s
macos-14(Silicon)/java 11-spark-3.4/rust	4m 22s
ubuntu-latest/java 11-spark-3.4/java	48m 17s
ubuntu-latest/java 17-spark-3.3/java	47m 37s
macos-14(Silicon)/java 8-spark-3.2/java	39m 5s
ubuntu-latest/java 17-spark-3.4/rust	6m 1s
macos-14(Silicon)/java 17-spark-3.3/java	34m 19s
ubuntu-latest/java 17-spark-3.4/java	46m 30s
macos-14(Silicon)/java 11-spark-3.4/java	43m 1s
macos-13/java 8-spark-3.4/rust	7m 34s
macos-14(Silicon)/java 17-spark-3.4/rust	6m 26s
macos-13/java 8-spark-3.4/java	1h 11m 43s
macos-14(Silicon)/java 17-spark-3.4/java	36m 0s
macos-13/java 11-spark-3.4/rust	11m 47s
macos-13/java 11-spark-3.4/java	1h 25m 43s
macos-13/java 17-spark-3.4/rust	9m 7s
macos-13/java 17-spark-3.4/java	1h 5m 28s
	13h 27m 16s

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