Decoding speedups #1821

Job	Run time
build (ubuntu-latest)	2m 54s
download_test_data	4s
build (macos-latest)	3m 44s
java_matrix	4s
unit_tests (21)	3m 11s
unit_tests (25)	3m 21s
generate_documentation	1m 6s
test_decoder	1m 50s
spotbugs	6m 45s
test_clara	4m 26s
test_coatjava (ubuntu-latest, eb-eg)	2m 26s
test_coatjava (ubuntu-latest, eb-ep)	1m 54s
test_coatjava (ubuntu-latest, kpp)	2m 50s
test_coatjava (ubuntu-latest, eb-epc)	2m 24s
test_coatjava (ubuntu-latest, eb-enc)	2m 15s
dependency_analysis	1m 12s
test_run-groovy	28s
test_coatjava (macos-latest, eb-ep, ./run-eb-tests.sh -100 electronproton)	3m 42s
test_coatjava (ubuntu-latest, eb-eftpi)	2m 8s
release_build	0s
deploy_web_pages	0s
final	4s
	46m 48s

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