Standard micro-benchmark issues with Java, run the 50 last and it'll run faster. JVM warmup, and JIT compilation, yadda, yadda, yadda.
On Thu, May 23, 2013 at 1:57 PM, Lewis John Mcgibbney < [email protected]> wrote: > Hi All, > A really nice aspect of the regex (urlfilter-automaton and urfilter-regex) > plugin implementation's in Nutch is that there is a small but very useful > RegexURLFilterBaseTest [0] which compares benchmarks for simple regex > parsing. > The results we get are as follows > > urls automaton regex > 50 343ms 210ms > 100 48ms 187ms > 200 65ms 363ms > 400 100ms 692ms > 800 165ms 1385ms > > The problem I have here is understanding why the first (50) bench appears > to be more expensive for both implementations? > Additionally, why does this same bench cost much more for automaton? > > Anyone have a clue? > Thanks > Lewis > > [0] > > http://svn.apache.org/viewvc/nutch/branches/2.x/src/plugin/lib-regex-filter/src/test/org/apache/nutch/urlfilter/api/RegexURLFilterBaseTest.java?view=markup > > -- > *Lewis* >
