Only hold content for open files in memory

[felixfbecker]

Addressing #57 (comment)

Content is only set on didOpen, and removed on didClose.
For indexing only the AST is kept.

It didn't reduce RAM usage unfortunately.

[codecov-io]

Current coverage is 90.67% (diff: 94.73%)

Merging #60 into master will increase coverage by 0.75%

@@             master        #60   diff @@
==========================================
  Files            23         23          
  Lines           496        504     +8   
  Methods          70         73     +3   
  Messages          0          0          
  Branches          0          0          
==========================================
+ Hits            446        457    +11   
+ Misses           50         47     -3   
  Partials          0          0          

Diff Coverage	File Path
••••••••• 93%	src/PhpDocument.php
•••••••••• 100%	src/LanguageServer.php
•••••••••• 100%	src/Server/TextDocument.php

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[mniewrzal]

I think you need unset $statements too with removeContent() and not keep them in PhpDocument after parse(). Memory saving for magento after removing content from PhpDocument on close what just about 20% (630MiB => 500 MiB).

[felixfbecker]

Yeah but that will not work with current implementation of definition index, they reference AST node, which in turn references parent node, etc.

20% is at least something.

I will look into completely removing the AST and only keeping an index of FQN => PhpDocument, then reparse the document on demand.

[felixfbecker]

Can we merge #35? Need to use uriToPath function

[mniewrzal]

Can we merge #35? Need to use uriToPath function

Yes, will you do rebase?

[felixfbecker]

Actually let's merge this first, doesn't hurt. Any objections?

[mniewrzal]

Nothing from my side.