StringTable in extractor uses a lot of memory

[DennisOSRM]

Extractor uses a hash table to keep track of previously encountered strings to only store them once. Unfortunately, that table uses a lot of RAM on large extracts.

[sivetic]

Have you considered the unordered_map branch of stxxl (link: https://stxxl.svn.sourceforge.net/svnroot/stxxl/branches/unordered_map/)? Not sure how stable the branch is.

[DennisOSRM]

Last time I checked with the student it was more or less running fine,
but not yet in production quality. One of the maintainers of stxxl just
left our group and I am not sure if active development is still taking
place or not.

Have you considered the unordered_map branch of stxxl (link: https://stxxl.svn.sourceforge.net/svnroot/stxxl/branches/unordered_map/)? Not sure how stable the branch is.

[DennisOSRM]

Flagging this as feature request since there is at least no leak.

[DennisOSRM]

Fixed. It was an unnecessary memory allocation.