WIP: make find faster

[bicycle1885]

using EzXML

function test1(doc)
    n = 0
    for term in find(doc, "/obo/term")
        findfirst(term, "./id")
        findfirst(term, "./name")
        findfirst(term, "./namespace")
        for is_a in find(term, "./is_a")
            n += 1
        end
    end
    return n
end

function test2(doc)
    n = 0
    for term in find(doc, "/obo/term")
        findfirst(term, "id")
        findfirst(term, "name")
        findfirst(term, "namespace")
        for is_a in find(term, "is_a")
            n += 1
        end
    end
    return n
end

doc = readxml("go_daily-termdb.obo-xml.gz")
test1(doc)
@time @show test1(doc)
test2(doc)
@time @show test2(doc)

~/.j/v/EzXML (faster-find|…) $ julia test.jl
test1(doc) = 75017
  3.418392 seconds (2.61 M allocations: 77.321 MB, 2.00% gc time)
test2(doc) = 75017
  0.163396 seconds (807.67 k allocations: 31.310 MB, 12.94% gc time)