performance

[kekeimiku]

rust-lang/rust#10761
rust-lang/rust#115271

In versions after v0.4.1, the pointer scanning speed will be 30% to 200% slower on some devices, mainly due to the above two problems. write! and binary_search.

Of course, this is easy to fix, just replace it with another implementation. But I'm not prepared to do that. Hopefully someone else or rust-lang can fix it.

Other:
Currently, a large amount of useless memory data will be dumped, which indirectly seriously affects the performance of pointer scanning.
Maybe there should be a good memory filter by default.