cannot convert simple .md file to ePub (CPU leak)

[ousia]

I cannot convert http://ousia.tk/font-face.md into an ePub with version 1.16.0.2 (on Fedora 22).

pandoc -o font-face.epub font-face.md seems to enter in a CPU leak.

[jgm]

This document has thousands of identically named headers.
I believe that is the problem. Translation slows down
as it goes, and it is almost certainly because
registerHeader uses a linked list of the previously
used header identifiers. Each time pandoc parses a
header, it needs to traverse this linked list. If the
list has thousands of elements, this can start to take
some time.

At least this hypothesis is consistent with the behavior
I'm seeing running a conversion to HTML.

There may also be a laziness-related space link. All this
can be solved by using better data structures, probably.
I didn't really think anyone would have more than a few
identically named headers -- and they won't appear in
real-world cases.

+++ Pablo Rodríguez [Jan 22 16 02:26 ]:

I cannot convert http://ousiatk/font-facemd into an ePub with version
11602 (on Fedora 22)

pandoc -o font-faceepub font-facemd seems to enter in a CPU leak

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References

1. cannot convert simple .md file to ePub (CPU leak) #2671