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update README

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Michael Teichgräber 2011-07-04 18:13:48 +02:00
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@ -14,11 +14,28 @@ Support for HTML output is implemented, but Groff and LaTeX
output have not been ported. The output should be identical output have not been ported. The output should be identical
to that of peg-markdown. to that of peg-markdown.
The Go version is around 3.5x slower than the original C A simple benchmark has been done by comparing the
version. A marked speed improvement has been achieved by execution time of the Go binary (cmd/main.go) and the
converting function `preformat` from concatenating strings original C implementation's binary needed for processing
to using bytes.Buffer. At other places, where this kind of a Markdown document, which had been created by
modification had been tried, performance did not improve. concatenating ten [Markdown syntax descriptions][syntax].
[syntax]: http://daringfireball.net/projects/markdown/syntax.text
In [December 2010][dec], the `8g` compiled Go version still was
around 3.5 times slower than the original C version.
[dec]: https://github.com/knieriem/markdown/commit/b3f7b3
In the meantime Go compilers and runtime have been improved,
which reduced the factor down to around 2.5 for both `8g` and `6g`
for the unmodified sources.
After some current changes to the peg/leg parser generator
the Markdown parser can take advantage of the *switch* optimization
now. This further reduced the execution time difference
to 1.9x for `6/8g`.
## Installation ## Installation