Description of Change

Solving magic sequence problem with a backtracking.

Description of Change

References

Checklist

After loading a new file and coming to the Configure Parsing Options page, you have the ability to modify the parsing rules, which I do pretty frequently with the kinds of (mostly tsv-like) files that I get. Most frequently I need to change the "Ignore first" and "Discard initial" parameters and since I usually need both of these and since my files are large and complex enough for the preview upda

steps to reproduce

Write a loop, from 1 to 80000, each time add a random int to the max heap.

In theory it takes very little time(NlogN, N=80000, <1sec ), but the program does take a long time.

I'v also tested the BinaryHeap in https://github.com/SolutionsDesign/Algorithmia, it performs well, so it is probably due to the bad algorithm.

In the following file we have already ported some tests from Go to Rust:
https://github.com/crossbeam-rs/crossbeam-channel/blob/master/tests/golang.rs

The idea is to blindly port all the tests for Go channels line by line, which will give us additional confidence in the correctness of crossbeam-channel.

In the test file, you can find stubs with links to the original tests written in Go and