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Average run times (10 samples) of rerooting tasks on various tree sizes in different implementations. The task involved reading, rerooting and printing out the tree as Newick. Runs of the BioPerl and APE implementation on the 20 000-leaf tree did not complete. Error bars show 1 SD. Computer: 3 GHz 64 bit Intel Core 2 Duo, 1 GB RAM, Linux 2.6. Made with R (R Development Core Team, 2008).
