Cache groups (testing needed)

init.lua

@@ -82,6 +82,7 @@ i3 = {
 
 	tabs = {},
 	cubes = {},
+	groups = {},
 	plants = {},
 	modules = {},
 	craft_types = {},

src/caches.lua

@@ -23,10 +23,22 @@ local function cache_fuel(item)
 	end
 end
 
-local function get_item_usages(item, recipe, added)
-	local groups = extract_groups(item)
+local function cache_groups(groupname, groups)
+	i3.groups[groupname] = {}
+	i3.groups[groupname].groups = groups
+	i3.groups[groupname].items = groups_to_items(groups, true)
+end
+
+local function get_item_usages(item, recipe, added)
+	if is_group(item) then
+		local groupname = item:sub(7)
+		local group_cache = i3.groups[groupname]
+		local groups = group_cache and group_cache.groups or extract_groups(item)
+
+		if not group_cache then
+			cache_groups(groupname, groups)
+		end
 
-	if groups then
 		for name, def in pairs(reg_items) do
 			if not added[name] and valid_item(def) and item_has_groups(def.groups, groups) then
 				local usage = copy(recipe)

src/common.lua

@@ -236,10 +236,8 @@ local function is_group(item)
 end
 
 local function extract_groups(str)
-	if sub(str, 1, 6) == "group:" then
 	return split(sub(str, 7), ",")
 end
-end
 
 local function item_has_groups(item_groups, groups)
 	for i = 1, #groups do
@@ -385,7 +383,8 @@ local function craft_stack(player, data, craft_rcp)
 		if is_group(name) then
 			items = {}
 			local groups = extract_groups(name)
-			local item_groups = groups_to_items(groups, true)
+			local groupname = name:sub(7)
+			local item_groups = i3.groups[groupname].items or groups_to_items(groups, true)
 			local remaining = count
 
 			for _, item in ipairs(item_groups) do

src/gui.lua

@@ -93,7 +93,9 @@ local function get_stack_max(inv, data, is_recipe, rcp)
 					local def = reg_items[item]
 
 					if def then
-						local groups = extract_groups(name)
+						local groupname = name:sub(7)
+						local group_cache = i3.groups[groupname]
+						local groups = group_cache and group_cache.groups or extract_groups(name)
 
 						if item_has_groups(def.groups, groups) then
 							counts_inv[name] = (counts_inv[name] or 0) + count
@@ -994,8 +996,10 @@ local function get_grid_fs(fs, data, rcp, is_recipe)
 		local groups
 
 		if is_group(name) then
-			groups = extract_groups(name)
-			name = groups_to_items(groups)
+			local groupname = name:sub(7)
+			local group_cache = i3.groups[groupname]
+			groups = group_cache and group_cache.groups or extract_groups(name)
+			name = group_cache and group_cache.items[1] or groups_to_items(groups)
 		end
 
 		local label = groups and "\nG" or ""

src/progressive.lua

@@ -32,7 +32,9 @@ local function item_in_inv(item, inv_items)
 	local inv_items_size = #inv_items
 
 	if is_group(item) then
-		local groups = extract_groups(item)
+		local groupname = item:sub(7)
+		local group_cache = i3.groups[groupname]
+		local groups = group_cache and group_cache.groups or extract_groups(item)
 
 		for i = 1, inv_items_size do
 			local def = core.registered_items[inv_items[i]]