Heavy memory usage

[vidister]

I have a bird instance with one routing table containing ~800k routes. When using birdwatcher to scrape these routes it uses ~8 Gigabytes of RAM. That seems a little much to me..
Bird, which also holds all the data, is using less than 200 Megabytes of memory.

bird:
$ pmap 2080 | tail -n 1 | awk '/[0-9]K/{print $2}'
178672K

birdwatcher:
$ pmap 9470 | tail -n 1 | awk '/[0-9]K/{print $2}'
8245008K

Is there a way to reduce the memory footprint of birdwatcher?