* Don't use _fs.realpathSync.native on windows, a semi-revert of #41292 (#43348)
We're planning a real fix for TS 4.3, but port the workaround from 4.2
so the beta doesn't have this bug.
(cherry picked from commit e462dfa347)
* Un-reverse condition
Co-authored-by: Orta Therox <ortam@microsoft.com>
* Extra tests in preparation for lazy signature making sure the original intent of test is maintained
* Whenver we cant use state delay signature calculation and use source file version as signature
* Incremental correctness checks
* Retain old behavior in compile on save by disabling use of file version as signature in when state is not reused
* Test that forceConsistentCasingInFileNames does not apply to Windows drive roots
* Add file symlink baselines
* Add directory symlink baselines
* Update test to retain its meaning
Its purpose is (apparently) to demonstrate that
forceConsistenCasingInFileNames can interact badly with synthesized
react imports. Since the casing of the synthesized import has changed,
also modify the casing of the explicit reference to still conflict.
* Make VFSWithWatch.realpath use the path on disk
* Update VFS realpathSync to behave like realpathSync.native
* Use fs.realpathSync.native when available
In local measurements of an Office project, we saw initial project
loading get 5% faster on Windows and 13% faster on Linux. The only
identified behavioral change is that it restores the case used on disk,
whereas realpathSync retains the input lowercase.
* Rename SortedMap.getKeyAndValue to getEntry
Future versions of node will be able to return undefined, rather than
allocating and throwing an exception, when a file is not found.
See https://github.com/nodejs/node/pull/33716
* Parse excludeDirectories and excludeFiles
* Use watch factory in typings installer
* Some refactoring for watchFactory
* Create Noop watcher if file or directory being watched is excluded
* Baselines without using exclude watch options
* Baselines including exclude option
* Handle exclude options in the system watches
* Add test without exclude option for recursive directory watching
* Test baselines with exclude option
* Always set sysLog
* Test for exclude option in server
* Add exclude options in the config file and fix the test
* Fix host configuration for server
* Handle host configuration for watch options
* Fix sysLog time log so baselines can be clean
* Handle reloadProjects to reload the project from scratch
* Ensure that file updates are reflected
* Feedback
* Feedback
The exception thrown by Node.js's fs.statSync function contains a stack
trace that can be expensive to compute. Since this exception isn't used
by fileSystemEntryExists, we can safely set Error.stackTraceLimit to 0
without a change in behavior.
---
A significant performance improvement was noticed with this change while
profiling tsserver on packages within a proprietary monorepo.
Specifically, my team saw high self time percentages for Node.js's
uvException and handleErrorFromBinding internal functions. These
functions are executed within fs.statSync when it fails to find the
given path.
https://user-images.githubusercontent.com/906558/90183227-220cb800-dd81-11ea-8d61-f41f89481f46.png
fs.statSync: https://github.com/nodejs/node/blob/v14.4.0/lib/fs.js#L1030-L1037
handleErrorFromBinding: https://github.com/nodejs/node/blob/v14.4.0/lib/internal/fs/utils.js#L254-L269
uvException: https://github.com/nodejs/node/blob/v14.4.0/lib/internal/errors.js#L390-L443
## Measurements
After adding Error.stackTraceLimit = 0, we saw:
- For a large configured project with 12,565 files, tsserver reached the
projectLoadingFinish event 48.78% faster. (~46.786s vs ~31.447s)
- For a medium project with 7,064 files, tsserver was 25.75% faster.
(~20.897s vs ~16.618s)
- For a small project with 796 files, tsserver was only a negligible
3.00% faster. (~3.545s vs ~3.442)
Measurements were taken on macOS 10.15.6, Node.js 14.4.0, and a recent
master commit of TypeScript (610fa28d). The average of 3 runs before and
after this change were taken.
I would normally include .cpuprofile and isolate-*-*-*.log files, but
can't post them publicly in this case. If there's any other summaries
the TypeScript team would be curious about I can report them.
## fs.statSync Misses
Within our monorepo, the fs.statSync misses were mostly searches for
alternative file extensions of module imports.
- For node_modules imports, a lot of .ts/.tsx lookups failed until the
.d.ts file was found.
- Within projects with a lot of JSX files, .ts files were looked for
before finding the .tsx version.
- In the medium scale project mentioned above, a total of 38,515
non-existent files were queried during createProgram.
* Add full implemention of Map and Set to shims
* Update default Map interface
* Remove WeakMap/WeakSet
* Add tests for set shim
* Update most usages of Map<K, true> to Set
* PR Feedback
* Fix lint issues
* Change key in fsWatchCallback
* Simpler shim, more tests
* Fix typo in collection shim
* If there is no changes to folder structure when watching directories recursively, send the updates to fileNames only
Fixes#37994
* Ignore excluded directories from wild card watching
* Testcase showing that renaming file with non sync directory watcher displays correct error in the end
Testcase for #38684
* Create different watch options in compiler options
* Thread through the new watch options
* Actually use the options passed through for watch strategy
* Support delay on updating child directory watches
* Make watchOptions separate from compilerOptions
* Support passing watch options from command line
* Handle displaying of watchOptions
* Remove redundant checker functions, use patterns more friendly to modules
* Also use a helper for localizedDiagnosticMessages
* Move types into same file as consts
* Accept slightly changed api baseline
* Whitespace!
Checking for directory existence is expensive and frequently indicates
success. Instead of pre-emptively creating the directory containing a
file to be written, attempt to create the file and only do the directory
scaffolding if the write fails.
Appears to reduce file write time by 10-20% for a file-I/O heavy partner
build.
Thanks to @rbuckton for the suggestion!
* Add support for capturing cpu profiles into tsc itself
* Accept baseline for new compiler option in showConfig
* Fix lints
* Support profiling build mode, only ever have one live profiling session
* Minor modification to enable/disable semaphore, accept re-cased baseline
* Add pid into autognerated cpuprofile path
* Rename to fix case
* Sanitize filepaths in emitted cpuprofile for easier adoption by enterprise people, add inspector to browser field
