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A Dynamic, Strongly Typed Language that targets the JVM infrastructure
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Has very strong integration with Java
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Almost all Java can be run as Groovy
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With Grapes, easy to write stand-alone scripts
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Easy to run bash commands from within script
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Sometimes bash is easier than writing code
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Groovy adds ".execute()" to both strings and arrays
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Groovy dependency manager
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Avoids need to for pom or build files
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Uses @Grab annotation to define dependencies
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Same format as Gradle dependencies
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Groovy framework for concurrent processing
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Only using small piece of the framework
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Concurrent dispatch
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Concurrent containers
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Has actor component I am not using
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To determine number of cpus/cores on a box:
cat /proc/cpuinfo | grep processor | wc -l-
Test data
[jmctee@Philae data (master)]$ ls
./ archive_11.zip archive_16.zip archive_20.zip archive_25.zip archive_3.zip archive_34.zip archive_39.zip archive_43.zip archive_48.zip archive_8.zip
../ archive_12.zip archive_17.zip archive_21.zip archive_26.zip archive_30.zip archive_35.zip archive_4.zip archive_44.zip archive_49.zip archive_9.zip
archive_0.zip archive_13.zip archive_18.zip archive_22.zip archive_27.zip archive_31.zip archive_36.zip archive_40.zip archive_45.zip archive_5.zip set1/
archive_1.zip archive_14.zip archive_19.zip archive_23.zip archive_28.zip archive_32.zip archive_37.zip archive_41.zip archive_46.zip archive_6.zip
archive_10.zip archive_15.zip archive_2.zip archive_24.zip archive_29.zip archive_33.zip archive_38.zip archive_42.zip archive_47.zip archive-
No parallelization
[jmctee@Philae data (master)]$ time ../unzipAndConvert.groovy 1
real 0m19.497s
user 0m15.138s
sys 0m6.691s-
2 Threads [jmctee@Philae data (master)]$ time ../unzipAndConvert.groovy 2
real 0m16.890s
user 0m15.335s
sys 0m6.585s-
4 Threads
[jmctee@Philae data (master)]$ time ../unzipAndConvert.groovy 4
real 0m14.786s
user 0m14.939s
sys 0m5.834s-
6 Threads
[jmctee@Philae data (master)]$ time ../unzipAndConvert.groovy 6
real 0m14.793s
user 0m15.184s
sys 0m6.255s