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Optimize menu sorting

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Sorting and deduplicating elements after all items have been registered
improves the time complexity of constructing the item list from O(n^2)
to O(n log n). On a system with about 4000 menu items, this reduces
startup time from about 0.21 seconds to 0.13 seconds.
This commit is contained in:
M Stoeckl 2024-10-31 09:23:26 -04:00
parent 12b8f83be4
commit 260eaba88e
5 changed files with 50 additions and 42 deletions
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8
menu.h
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@ -13,7 +13,6 @@ typedef void (*menu_callback)(struct menu *menu, char *text, bool exit);
struct item {
char *text;
int width;
struct item *next; // traverses all items
struct item *prev_match; // previous matching item
struct item *next_match; // next matching item
struct page *page; // the page holding this item
@ -64,8 +63,8 @@ struct menu {
char input[BUFSIZ];
size_t cursor;
struct item *items; // list of all items
struct item *lastitem; // last item in the list
struct item *items; // array of all items
size_t item_count;
struct item *matches; // list of matching items
struct item *matches_end; // last matching item
struct item *sel; // selected item
@ -79,7 +78,8 @@ struct menu {
struct menu *menu_create(menu_callback callback);
void menu_destroy(struct menu *menu);
void menu_getopts(struct menu *menu, int argc, char *argv[]);
void menu_add_item(struct menu *menu, char *text, bool sort);
void menu_add_item(struct menu *menu, char *text);
void menu_sort_and_deduplicate(struct menu *menu);
void menu_render_items(struct menu *menu);
void menu_paste(struct menu *menu, const char *text, ssize_t len);
void menu_keypress(struct menu *menu, enum wl_keyboard_key_state key_state,