Performance: Use maps instead of objects.

[aikar]

In numerous places across the project, standard JS objects are used instead of Maps for Map like data structures.

Maps offer better performance over objects-as-maps, and can be done in places like callback storage (ie object.callbacks[id] = cb;) type patterns.

cote/src/components/time-balanced-requester.js

Line 12 in 8ad0155

this.callbacks = {};

cote/src/components/pending-balanced-requester.js

Line 36 in ac31387

sock.callbacks[cbId].sock = sentSock;