On Fri, Nov 21, 2014 at 6:09 AM, Michael Haggerty <mhagger@xxxxxxxxxxxx> wrote:
> Inserting items into a list in sorted order is O(N^2) whereas
> appending them unsorted and then sorting the list all at once is
> O(N lg N).
>
> string_list_insert() also removes duplicates, and this change loses
> that functionality. But the strings in this list, which ultimately
> come from a for_each_ref() iteration, cannot contain duplicates.
>
A similar conversion in other places we may do in the future
might find a need for an equivalent to "-u" option of "sort" in the
string_list_sort() function, but the above nicely explains why
it is not necessary for this one. Good.
Eh, why is that called sort_string_list()? Perhaps it is a good
opening to introduce string_list_sort(list, flag) where flag would
be a bitmask that represents ignore-case, uniquify, etc., and
then either deprecate the current one or make it a thin wrapper
of the one that is more consistently named.
> Signed-off-by: Michael Haggerty <mhagger@xxxxxxxxxxxx>
> ---
> builtin/remote.c | 3 ++-
> 1 file changed, 2 insertions(+), 1 deletion(-)
>
> diff --git a/builtin/remote.c b/builtin/remote.c
> index d5a5a16..7d5c8d2 100644
> --- a/builtin/remote.c
> +++ b/builtin/remote.c
> @@ -1341,8 +1341,9 @@ static int prune_remote(const char *remote, int dry_run)
> const char *refname = states.stale.items[i].util;
>
> delete_refs[i] = refname;
> - string_list_insert(&delete_refs_list, refname);
> + string_list_append(&delete_refs_list, refname);
> }
> + sort_string_list(&delete_refs_list);
>
> if (!dry_run) {
> struct strbuf err = STRBUF_INIT;
> --
> 2.1.3
>
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