I’ve opened this issue on Ground DB’s GitHub page as well, so I’m really just copying this from there, trying to find anybody who might be familiar with this.
I’m having an issue where, whenever I make an insert, or even a removal of a document, my UI hangs up, sometimes for several seconds or more, before the user can take any other action. It seems to be most apparent when inserting or removing documents with base64 image data, although I am resizing those images before inserting so that they are, on average, about 90-150KB.
I didn’t notice this issue at first because on iOS or in desktop browsers, the hang-up only seems to last about half a second to a full second, but on Android devices we’ve noticed it lasting, often times, 5-8 seconds.
My collections are initialized on startup as ground collections.
Meteor.startup(function() {
Orders = new Ground.Collection("Orders");
Details = new Ground.Collection("Details");
Photos = new Ground.Collection("Photos");
Profiles = new Ground.Collection("Contacts");
AppRegistry = new Ground.Collection("ApplicationRegistry");
UserSettings = new Ground.Collection("UserSettings");
Ground.Collection(Meteor.users);
});
Subs are made inside of a tracker once Ground is ready…
Tracker.autorun(function () {
// Make tracker reactive to user logging in.
// And use this object to get user's sub ID
var loggedUser = Meteor.users.findOne(Meteor.userId());
if(!loggedUser) {
return;
}
// Most subs made with the users's subscription ID that we add to their users collection record when they register
if(Ground.ready) {
var appSub = Meteor.subscribe('appregistry', {
onReady: function() {console.log("AppReg ready");}
});
var ordersSub = Meteor.subscribe('orders', loggedUser.SubscriptionID, {
onReady: function() {console.log("Orders ready");
Session.set('ordersStatus', true);
}
});
var detailsSub = Meteor.subscribe('details', loggedUser.SubscriptionID, {
onReady: function() {console.log("Details ready");
Session.set('detailsStatus', true);
}
});
var photosSub = Meteor.subscribe('photos', loggedUser.SubscriptionID, {
onReady: function() {console.log("Photos ready");
Session.set('photosStatus', true);
}
});
var profilesSub = Meteor.subscribe('profiles', loggedUser.SubscriptionID, {
onReady: function() {console.log("Profiles ready");
Session.set('profilesStatus', true);
}
});
var settingsSub = Meteor.subscribe('usersettings', loggedUser.SubscriptionID, {
onReady: function() {console.log("Settings ready");
}
});
}
});
There is nothing special about the pubs other than using the subscriptionID from the subs to return appropriate data.
After running the Profiler in Chrome to observe what goes on during an insert, I noticed some functions coming from Ground DB, as well as some of its dependencies, taking up a considerable amount of time, so I’m assuming this is what’s causing my UI hang-ups.
Has anyone seen this type of behavior, or have a solution maybe? Some sort of workaround or maybe something I’ve overlooked in the documentation.