Lower or control memory usage

[jirfag]

Users complain about too much memory usage exceeding 8gb

[lopezator]

Related to #342 and pointers usage on latest commit.

We could dig more, sure, but it's a start.

[jirfag]

Hi!
A current solution may be to configure GOGC: it can trade memory to time and decrease memory usage in ~2 times. I've shown some results here.

[jirfag]

mem.pdf
Also, I've profiled memory of golangci-lint: PDF with results is attached. We can see that type checking consumes the most of memory. I have some ideas on how to fix it but they are all too costly to implement.

[alexec]

We have regular intermittent build failures due to high memory usage. It would be good to reduce usage.

Currently: we're using...

GOGC=20 golangci-lint run --fix --verbose --concurrency 1 --deadline 3m0s

See https://github.com/golangci/golangci-lint#memory-usage-of-golangci-lint

[howardjohn]

istio/istio repo uses 32gb to lint: INFO Memory: 218 samples, avg is 18237.6MB, max is 31795.7MB

[daxmc99]

👍
Looking forward to testing out master

[jirfag]

I've merged a fix reducing memory usage of go/analysis linters (staticcheck, gosimple, stylecheck, bodyclose, govet) 5x. Please, check it in a master branch.