Import speed improvements, and adding an import URL batch size of 5,000 to stop accidental CPU overload (#549)

changedetectionio/__init__.py

@@ -661,13 +661,19 @@ def changedetection_app(config=None, datastore_o=None):
         good = 0
 
         if request.method == 'POST':
+            now=time.time()
             urls = request.values.get('urls').split("\n")
+
+            if (len(urls) > 5000):
+                flash("Importing 5,000 of the first URLs from your list, the rest can be imported again.")
+
             for url in urls:
                 url = url.strip()
                 url, *tags = url.split(" ")
                 # Flask wtform validators wont work with basic auth, use validators package
-                if len(url) and validators.url(url.replace('source:', '')):
+                # Up to 5000 per batch so we dont flood the server
-                    new_uuid = datastore.add_watch(url=url.strip(), tag=" ".join(tags))
+                if len(url) and validators.url(url.replace('source:', '')) and good < 5000:
+                    new_uuid = datastore.add_watch(url=url.strip(), tag=" ".join(tags), write_to_disk_now=False)
                     # Straight into the queue.
                     update_q.put(new_uuid)
                     good += 1
@@ -675,7 +681,8 @@ def changedetection_app(config=None, datastore_o=None):
                     if len(url):
                         remaining_urls.append(url)
 
-            flash("{} Imported, {} Skipped.".format(good, len(remaining_urls)))
+            flash("{} Imported in {:.2f}s, {} Skipped.".format(good, time.time()-now,len(remaining_urls)))
+            datastore.needs_write = True
 
             if len(remaining_urls) == 0:
                 # Looking good, redirect to index.

changedetectionio/model/Watch.py

@@ -13,7 +13,6 @@ from changedetectionio.notification import (
 
 class model(dict):
     def __init__(self, *arg, **kw):
-        super(model, self).__init__(*arg, **kw)
         self.update({
             'url': None,
             'tag': None,
@@ -45,6 +44,9 @@ class model(dict):
             # Should be all None by default, so we use the system default in this case.
             'minutes_between_check': None
         })
+        # goes at the end so we update the default object with the initialiser
+        super(model, self).__init__(*arg, **kw)
+
 
     @property
     def has_empty_checktime(self):

changedetectionio/store.py

@@ -272,15 +272,14 @@ class ChangeDetectionStore:
         self.needs_write = True
         return changes_removed
 
-    def add_watch(self, url, tag="", extras=None):
+    def add_watch(self, url, tag="", extras=None, write_to_disk_now=True):
         if extras is None:
             extras = {}
 
         with self.lock:
             # @todo use a common generic version of this
             new_uuid = str(uuid_builder.uuid4())
-            _blank = deepcopy(self.generic_definition)
+            new_watch = Watch.model({
-            _blank.update({
                 'url': url,
                 'tag': tag
             })
@@ -291,9 +290,8 @@ class ChangeDetectionStore:
                 if k in apply_extras:
                     del apply_extras[k]
 
-            _blank.update(apply_extras)
+            new_watch.update(apply_extras)
-
+            self.__data['watching'][new_uuid]=new_watch
-            self.data['watching'][new_uuid] = _blank
 
         # Get the directory ready
         output_path = "{}/{}".format(self.datastore_path, new_uuid)
@@ -302,7 +300,8 @@ class ChangeDetectionStore:
         except FileExistsError:
             print(output_path, "already exists.")
 
-        self.sync_to_json()
+        if write_to_disk_now:
+            self.sync_to_json()
         return new_uuid
 
     # Save some text file to the appropriate path and bump the history

changedetectionio/update_worker.py

@@ -2,6 +2,7 @@ import threading
 import queue
 import time
 
+from changedetectionio import content_fetcher
 # A single update worker
 #
 # Requests for checking on a single site(watch) from a queue of watches
@@ -32,7 +33,6 @@ class update_worker(threading.Thread):
 
             else:
                 self.current_uuid = uuid
-                from changedetectionio import content_fetcher
 
                 if uuid in list(self.datastore.data['watching'].keys()):