gnulib-tool --import slowness

[Simon Josefsson]

Running "gnulib-tool --import" has become slow:

address@hidden:~/src/gnutls$ time gnulib-tool --import
...
real    0m47.043s
user    0m19.559s
sys     0m10.299s
address@hidden:~/src/gnutls$

This is on GnuTLS, which uses:

gl_MODULES([error getline getpass memmem memmove minmax readline snprintf])

It appears to be calling sed 10-15 times for every imported files.
Can't we use

perl -pi -e 's/foo/bar' *.c

or something else instead?  Or someone optimize the sed calls.

Importing used to take ~1s here.

Thanks,
Simon