Only show last 200 elements in the UI history tab.

execution.py

@@ -750,10 +750,20 @@ class PromptQueue:
                     return True
         return False
 
-    def get_history(self, prompt_id=None):
+    def get_history(self, prompt_id=None, max_items=None, offset=-1):
         with self.mutex:
             if prompt_id is None:
-                return copy.deepcopy(self.history)
+                out = {}
+                i = 0
+                if offset < 0 and max_items is not None:
+                    offset = len(self.history) - max_items
+                for k in self.history:
+                    if i >= offset:
+                        out[k] = self.history[k]
+                        if max_items is not None and len(out) >= max_items:
+                            break
+                    i += 1
+                return out
             elif prompt_id in self.history:
                 return {prompt_id: copy.deepcopy(self.history[prompt_id])}
             else:

server.py

@@ -431,7 +431,10 @@ class PromptServer():
 
         @routes.get("/history")
         async def get_history(request):
-            return web.json_response(self.prompt_queue.get_history())
+            max_items = request.rel_url.query.get("max_items", None)
+            if max_items is not None:
+                max_items = int(max_items)
+            return web.json_response(self.prompt_queue.get_history(max_items=max_items))
 
         @routes.get("/history/{prompt_id}")
         async def get_history(request):

web/scripts/api.js

@@ -256,7 +256,7 @@ class ComfyApi extends EventTarget {
 	 */
 	async getHistory() {
 		try {
-			const res = await this.fetchApi("/history");
+			const res = await this.fetchApi("/history?max_items=200");
 			return { History: Object.values(await res.json()) };
 		} catch (error) {
 			console.error(error);