improve rrdom performance (#1127)

* add more check to rrdom to make diff algorithm more robust

* fix: selector match in iframe is case-insensitive

add try catch to some fragile points

* test: increase timeout value for Jest

* improve code style

* fix: failed to execute insertBefore on Node in the diff function

this happens when ids of doctype or html element are changed in the virtual dom

also improve the code quality

* refactor diff function to make the code cleaner

* fix: virtual nodes are passed to plugin's onBuild function

* refactor the diff function and adjust the order of diff work.

* call afterAppend hook in a consistent traversal order

* improve the performance of the "contains" function

reduce the complexity from O(n) to O(logn)
a specific benchmark is needed to add further

* add a real events for benchmark

* refactor: change the data structure of childNodes from array to linked list

* remove legacy code in rrweb package

* update unit tests

* update change log

packages/rrdom/test/diff.test.ts

@@ -1271,7 +1271,7 @@ describe('diff algorithm for rrdom', () => {
       expect(rrdom.mirror.getId(rrdom)).toBe(-2);
       expect(rrdom.mirror.getId(rrdom.body)).toBe(-6);
 
-      rrdom.childNodes = [];
+      while (rrdom.firstChild) rrdom.removeChild(rrdom.firstChild);
       /**
        * Rebuild the rrdom and make it looks like this:
        * -7 RRDocument