Jens Johansen
cddee72854
Before this CL, if one has a file like
```
Map<String, String> foo = {
"1": "1",
"2": "2",
"3": "3",
[...]
```
with many violations of the prefer_single_quotes lint, using VSCode and
selecting all would lock up the analysis server, e.g. in
https://dart-review.googlesource.com/c/sdk/+/425503 I showed 400 such
lines taking ~36 seconds on my machine (and 800 such lines taking ~247
seconds).
This is because for each error (lint) in range (i.e. all of them) it
calculates fixes for all of them. Once it's done with that it
deduplicates and throws most of the data away again.
This CL instead only calculates the "fixes for all" for each
combination of error-type and generator, skipping lots of work,
making the whole thing be much faster.
In the data send to the client (VSCode in this instance) the
"diagnostics" for
"Convert to single quoted strings everywhere in file"
contains fewer elements (only 1, vs all before), but it's unclear when
(or if) this is used. Note that the "edit"s does contain all, and
applying it still changes all instances.
I now get these runtimes for the select all case (via the benchmark)
(with cpu governor "performance" which likely wasn't the case for
the ~36 seconds and ~247 seconds above, although it doesn't matter
much with these differences):
400: 0.736783
800: 1.502978
1600: 3.704314
3200: 10.701988
Change-Id: I2b69a77525c0e1ed720c2b3d1de70ccc1fc5e94c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/425861
Reviewed-by: Brian Wilkerson <brianwilkerson@google.com>
Commit-Queue: Jens Johansen <jensj@google.com>
analysis_server
A long-running process that provides analysis results to other tools.
The analysis server is designed to provide on-going analysis of one or more code bases as those code bases are changing.
Using the server
The analysis server is not intended to be used stand-alone, and therefore does not have a human-friendly user interface.
Clients (typically tools, such as an editor) are expected to run the analysis
server in a separate process and communicate with it using a JSON protocol. The
original protocol is specified in the file analysis_server/doc/api.html
and Language Server Protocol support is documented in
tool/lsp_spec/README.md.
Features and bugs
Please file feature requests and bugs at the issue tracker.