improve rrdom performance

[YunFeng0817]

Performance Issue

In the repo benchmark-events, I uploaded one huge event data file. This file is recorded on the page https://bugs.chromium.org/p/chromium/issues/list?mode=grid with the rrweb browser extension.
The performance of rrdom is challenged in this situation.

From the screenshot of the performance profile, we can see that the contains function in rrdom is a performance bottleneck. Besides, as @Yuyz0112 has mentioned before (#853 (comment)), the current implementation for storing nodes with array data structure may cause a lot of iteration when inserting new nodes into the tree.

benchmark result before the optimization

    ┌─────────┬─────────────────────────────────────────────┬───────┬───────────────────┬────────────────────┐
    │ (index) │                    title                    │ times │     duration      │     durations      │
    ├─────────┼─────────────────────────────────────────────┼───────┼───────────────────┼────────────────────┤
    │    0    │ 'real events recorded on bugs.chromium.org' │   3   │ 4899.333333333333 │ '4870, 4842, 4986' │
    └─────────┴─────────────────────────────────────────────┴───────┴───────────────────┴────────────────────┘

Optimization

1. Refactor: change the data structure of childNodes from array to linked list
2. Improve the performance of the "contains" function. New algorithm will reduce the complexity from O(n) to O(logn)

benchmark result after the optimization

    ┌─────────┬─────────────────────────────────────────────┬───────┬──────────┬────────────────────┐
    │ (index) │                    title                    │ times │ duration │     durations      │
    ├─────────┼─────────────────────────────────────────────┼───────┼──────────┼────────────────────┤
    │    0    │ 'real events recorded on bugs.chromium.org' │   3   │   2717   │ '2703, 2738, 2710' │
    └─────────┴─────────────────────────────────────────────┴───────┴──────────┴────────────────────┘

After the optimization, from the performance profile, there's no more significant performance bottleneck in RRDom anymore. The performance improvement under this scenario is around 80%.

[changeset-bot]

🦋 Changeset detected

Latest commit: 3f6eb9e

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 5 packages

Name	Type
rrdom	Major
rrdom-nodejs	Major
rrweb	Patch
rrweb-player	Patch
rrweb-snapshot	Patch

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