url: using util._extend for improving profermace
Object.assign is much slower than util._extend according to
the refs. This change is to convert the Object.assign to use
util._extend in url module for improving profermance.
Refs: https://github.com/nodejs/CTC/issues/62
Benchmark:
url/url-resolve.js n=100000 path="down" href="auth" 0.73 % 4.001573e-01
url/url-resolve.js n=100000 path="down" href="dot" -0.28 % 8.223166e-01
url/url-resolve.js n=100000 path="down" href="file" 1.69 % 1.027301e-01
url/url-resolve.js n=100000 path="down" href="idn" 0.87 % 4.341655e-01
url/url-resolve.js n=100000 path="down" href="javascript" 3.48 % * 4.274686e-02
url/url-resolve.js n=100000 path="down" href="long" 1.36 % 1.400734e-01
url/url-resolve.js n=100000 path="down" href="noscheme" -2.57 % 7.697437e-02
url/url-resolve.js n=100000 path="down" href="percent" 0.73 % 5.244919e-01
url/url-resolve.js n=100000 path="down" href="short" 4.44 % *** 3.820092e-04
url/url-resolve.js n=100000 path="down" href="ws" 1.59 % * 2.243749e-02
url/url-resolve.js n=100000 path="foo/bar" href="auth" 1.94 % * 4.641876e-02
url/url-resolve.js n=100000 path="foo/bar" href="dot" 5.24 % *** 5.656288e-05
url/url-resolve.js n=100000 path="foo/bar" href="file" 2.64 % 9.331631e-02
url/url-resolve.js n=100000 path="foo/bar" href="idn" -0.45 % 6.854409e-01
url/url-resolve.js n=100000 path="foo/bar" href="javascript" -1.07 % 5.415987e-01
url/url-resolve.js n=100000 path="foo/bar" href="long" 0.49 % 5.780417e-01
url/url-resolve.js n=100000 path="foo/bar" href="noscheme" 5.08 % ** 5.798221e-03
url/url-resolve.js n=100000 path="foo/bar" href="percent" 0.04 % 9.816567e-01
url/url-resolve.js n=100000 path="foo/bar" href="short" 2.21 % 1.986360e-01
url/url-resolve.js n=100000 path="foo/bar" href="ws" 0.29 % 7.859900e-01
url/url-resolve.js n=100000 path="sibling" href="auth" 1.95 % * 3.832157e-02
url/url-resolve.js n=100000 path="sibling" href="dot" 1.83 % 7.399938e-02
url/url-resolve.js n=100000 path="sibling" href="file" 2.44 % * 3.722787e-02
url/url-resolve.js n=100000 path="sibling" href="idn" 0.83 % 3.692427e-01
url/url-resolve.js n=100000 path="sibling" href="javascript" 0.09 % 9.523714e-01
url/url-resolve.js n=100000 path="sibling" href="long" 1.80 % 6.542290e-02
url/url-resolve.js n=100000 path="sibling" href="noscheme" -0.20 % 8.973654e-01
url/url-resolve.js n=100000 path="sibling" href="percent" 0.57 % 6.611122e-01
url/url-resolve.js n=100000 path="sibling" href="short" 0.94 % 4.288303e-01
url/url-resolve.js n=100000 path="sibling" href="ws" 1.74 % * 3.850364e-02
url/url-resolve.js n=100000 path="up" href="auth" 1.56 % 1.695226e-01
url/url-resolve.js n=100000 path="up" href="dot" 1.59 % 5.566368e-02
url/url-resolve.js n=100000 path="up" href="file" 0.03 % 9.810652e-01
url/url-resolve.js n=100000 path="up" href="idn" 0.58 % 4.708234e-01
url/url-resolve.js n=100000 path="up" href="javascript" 2.68 % * 1.764476e-02
url/url-resolve.js n=100000 path="up" href="long" -0.23 % 8.000201e-01
url/url-resolve.js n=100000 path="up" href="noscheme" 0.57 % 7.034992e-01
url/url-resolve.js n=100000 path="up" href="percent" 1.69 % 1.894380e-01
url/url-resolve.js n=100000 path="up" href="short" -0.94 % 4.023246e-01
url/url-resolve.js n=100000 path="up" href="ws" 1.01 % 2.854117e-01
url/url-resolve.js n=100000 path="withscheme" href="auth" 0.52 % 7.065682e-01
url/url-resolve.js n=100000 path="withscheme" href="dot" 0.44 % 7.631471e-01
url/url-resolve.js n=100000 path="withscheme" href="file" -0.22 % 8.804126e-01
url/url-resolve.js n=100000 path="withscheme" href="idn" 3.35 % * 1.185270e-02
url/url-resolve.js n=100000 path="withscheme" href="javascript" 0.01 % 9.954955e-01
url/url-resolve.js n=100000 path="withscheme" href="long" 0.80 % 3.409249e-01
url/url-resolve.js n=100000 path="withscheme" href="noscheme" -0.60 % 7.459196e-01
url/url-resolve.js n=100000 path="withscheme" href="percent" 0.83 % 6.370433e-01Checklist
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make -j4 test(UNIX), orvcbuild test(Windows) passes -
tests and/or benchmarks are included -
commit message follows commit guidelines
Affected core subsystem(s)
url