fix performance by remove unnecessary O(n^2) and O(n^3) calls #271
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tobalancemap has a huge perf issue that causes continuous almost 100% cpu use if you scan a few thousand addresses. the cause is a reduce call that creates huge amounts of objects because of a clever reduce that makes it O(n^2) instead of a simple loop. this fixes that.
profiler screenshot before:
![image](https://private-user-images.githubusercontent.com/2303841/283288996-3459eb5f-47be-4c5b-af95-c7955507cf30.png?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.mtR4aaY3TI7R525VMUiXe5Vh-41SsMsQilym8V9kzYk)