Remove dependency on fastutil #101
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Fastutil is our largest dependency and consumes a third of the overall Heritrix distribution size. If we update to the latest version it will be even larger. But we're only using two tiny classes from it: the trivial RepositionableStream interface and the unsynchronized FastBufferedOutputStream. Some downstream users (e.g. lockss-core) actually implement RepositionableStream, so to preserve API compatiblity this change includes a copy of just that interface while keeping the same package name. Regarding FastBufferedOutputStream, for WARC writing the outer GZIPOutputStream is synchronized anyway. And RecordingOutputStream will typically be doing moderately large writes copying from the network. So in both usages it seems unlikely that there's much practical benefit in using it here over the standard BufferedOutputStream. The JVM JIT has a lot of optimizations for synchronized these days too.
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Fastutil is our largest dependency and consumes a third of the overall Heritrix distribution size. If we update to the latest version it will be even larger. But we're only using two tiny classes from it: the trivial RepositionableStream interface and the unsynchronized FastBufferedOutputStream.
Some downstream users (e.g. lockss-core) actually implement RepositionableStream, so to preserve API compatiblity this change includes a copy of just that interface while keeping the same package name.
Regarding FastBufferedOutputStream, for WARC writing the outer GZIPOutputStream is synchronized anyway. And RecordingOutputStream will typically be doing moderately large writes copying from the network. So in both usages it seems unlikely that there's much practical benefit in using it here over the standard BufferedOutputStream. The JVM JIT has a lot of optimizations for synchronized these days too.