Some numbers below. In short, the saving on wt_status_collect_untracked() is about 80%. There are some overhead on read/write_cache, but it seems lower than 50ms, while the .._untracked() saving is in the 500ms range (except linux-2.6, about 150ms). "git status" time saving ranges from 33% to 42%. On gentoo-x86.git (100k files, 23k dirs, quite balance tree, 8.5MB index v4, cache-tree fully populated), before turning untracked cache on (the most important line is wt_status_collect:625) 184.650 gitmodules_config:201 if (read_cache() < 0) die("index 0.004 cmd_status:1299 read_cache_preload(&s.pathspec) 226.231 cmd_status:1300 refresh_index(&the_index, REFRESH_QUIET 3.096 cmd_status:1304 update_index_if_able(&the_index, &index_lock) 6.788 wt_status_collect:619 wt_status_collect_changes_worktree(s) 6.780 wt_status_collect:624 wt_status_collect_changes_index(s) 772.866 wt_status_collect:625 wt_status_collect_untracked(s) 786.686 cmd_status:1308 wt_status_collect(&s) real 0m1.211s user 0m0.566s sys 0m0.638s and after (saving 42% total time): 220.888 gitmodules_config:201 if (read_cache() < 0) die("index 36.368 cmd_status:1299 read_cache_preload(&s.pathspec) 223.936 cmd_status:1300 refresh_index(&the_index, REFRESH_QUIET 2.935 cmd_status:1304 update_index_if_able(&the_index, &index_lock) 7.031 wt_status_collect:619 wt_status_collect_changes_worktree(s) 7.156 wt_status_collect:624 wt_status_collect_changes_index(s) 148.022 wt_status_collect:625 wt_status_collect_untracked(s) 162.443 cmd_status:1308 wt_status_collect(&s) 36.943 cmd_status:1348 if (the_index.untracked) { struct real 0m0.696s user 0m0.406s sys 0m0.288s On webkit.git (182k files, 6k dirs, 14M index v4), before: 283.182 gitmodules_config:201 if (read_cache() < 0) die("index 0.004 cmd_status:1299 read_cache_preload(&s.pathspec) 515.836 cmd_status:1300 refresh_index(&the_index, REFRESH_QUIET 5.428 cmd_status:1304 update_index_if_able(&the_index, &index_lock) 11.162 wt_status_collect:619 wt_status_collect_changes_worktree(s) 11.068 wt_status_collect:624 wt_status_collect_changes_index(s) 887.247 wt_status_collect:625 wt_status_collect_untracked(s) 909.722 cmd_status:1308 wt_status_collect(&s) real 0m1.729s user 0m0.785s sys 0m0.941s and after (saving 38% total time): 290.994 gitmodules_config:201 if (read_cache() < 0) die("index 10.132 cmd_status:1299 read_cache_preload(&s.pathspec) 516.656 cmd_status:1300 refresh_index(&the_index, REFRESH_QUIET 5.159 cmd_status:1304 update_index_if_able(&the_index, &index_lock) 12.605 wt_status_collect:619 wt_status_collect_changes_worktree(s) 11.262 wt_status_collect:624 wt_status_collect_changes_index(s) 186.032 wt_status_collect:625 wt_status_collect_untracked(s) 210.134 cmd_status:1308 wt_status_collect(&s) 12.332 cmd_status:1348 if (the_index.untracked) { struct index_state real 0m1.058s user 0m0.525s sys 0m0.532s And linux-2.6 (45k files, 3k dirs, 3.2MB index v4), before: 68.668 gitmodules_config:201 if (read_cache() < 0) die("index 0.004 cmd_status:1299 read_cache_preload(&s.pathspec) 114.270 cmd_status:1300 refresh_index(&the_index, REFRESH_QUIET 1.180 cmd_status:1304 update_index_if_able(&the_index, &index_lock) 4.027 wt_status_collect:619 wt_status_collect_changes_worktree(s) 4.265 wt_status_collect:624 wt_status_collect_changes_index(s) 191.285 wt_status_collect:625 wt_status_collect_untracked(s) 199.825 cmd_status:1308 wt_status_collect(&s) real 0m0.392s user 0m0.177s sys 0m0.215s and after (saving 33%): 71.756 gitmodules_config:201 if (read_cache() < 0) die("index 5.201 cmd_status:1299 read_cache_preload(&s.pathspec) 111.064 cmd_status:1300 refresh_index(&the_index, REFRESH_QUIET 1.171 cmd_status:1304 update_index_if_able(&the_index, &index_lock) 3.054 wt_status_collect:619 wt_status_collect_changes_worktree(s) 4.945 wt_status_collect:624 wt_status_collect_changes_index(s) 27.203 wt_status_collect:625 wt_status_collect_untracked(s) 35.475 cmd_status:1308 wt_status_collect(&s) 25.759 cmd_status:1348 if (the_index.untracked) { struct index_state real 0m0.259s user 0m0.106s sys 0m0.132s --- builtin/update-index.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/builtin/update-index.c b/builtin/update-index.c index ba54e19..003e28e 100644 --- a/builtin/update-index.c +++ b/builtin/update-index.c @@ -734,6 +734,7 @@ static int reupdate_callback(struct parse_opt_ctx_t *ctx, int cmd_update_index(int argc, const char **argv, const char *prefix) { int newfd, entries, has_errors = 0, line_termination = '\n'; + int untracked_cache = -1; int read_from_stdin = 0; int prefix_length = prefix ? strlen(prefix) : 0; int preferred_index_format = 0; @@ -822,6 +823,8 @@ int cmd_update_index(int argc, const char **argv, const char *prefix) resolve_undo_clear_callback}, OPT_INTEGER(0, "index-version", &preferred_index_format, N_("write index in this format")), + OPT_BOOL(0, "untracked-cache", &untracked_cache, + N_("enable/disable untracked cache")), OPT_END() }; @@ -915,6 +918,20 @@ int cmd_update_index(int argc, const char **argv, const char *prefix) strbuf_release(&buf); } + if (untracked_cache > 0) { + struct untracked_cache *uc; + + uc = xcalloc(1, sizeof(*uc)); + uc->exclude_per_dir = ".gitignore"; + /* should be the same flags used by git-status */ + uc->dir_flags = DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES; + the_index.untracked = uc; + active_cache_changed = 1; + } else if (!untracked_cache) { + the_index.untracked = NULL; + active_cache_changed = 1; + } + if (active_cache_changed) { if (newfd < 0) { if (refresh_args.flags & REFRESH_QUIET) -- 1.9.1.346.ga2b5940 -- To unsubscribe from this list: send the line "unsubscribe git" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html