Add setting to control speed of diagnostic publishing

news/1 Enhancements/2270.md

@@ -0,0 +1 @@
+python.analysis.diagnosticPublishDelay allows you to control when language server publishes diagnostics. Default is 1 second after the user activity, such a typing, ceases. If diagnostic is clear (i.e. errors got fixed), the publishing is immediate.

package.json

@@ -823,6 +823,12 @@
                     "description": "Only show errors and warnings for open files rather than for the entire workspace.",
                     "scope": "resource"
                 },
+                "python.analysis.diagnosticPublishDelay": {
+                    "type": "integer",
+                    "default": 1000,
+                    "description": "Delay before diagnostic messages are transferred to the problems list.",
+                    "scope": "resource"
+                },
                 "python.analysis.typeshedPaths": {
                     "type": "array",
                     "default": [],

src/client/activation/languageServer.ts

@@ -3,18 +3,24 @@
 
 import { inject, injectable } from 'inversify';
 import * as path from 'path';
-import { CancellationToken, CompletionContext, OutputChannel, Position,
-     TextDocument, Uri } from 'vscode';
-import { Disposable, LanguageClient, LanguageClientOptions,
-    ProvideCompletionItemsSignature, ServerOptions } from 'vscode-languageclient';
+import {
+    CancellationToken, CompletionContext, OutputChannel, Position,
+    TextDocument, Uri
+} from 'vscode';
+import {
+    Disposable, LanguageClient, LanguageClientOptions,
+    ProvideCompletionItemsSignature, ServerOptions
+} from 'vscode-languageclient';
 import { IApplicationShell, ICommandManager, IWorkspaceService } from '../common/application/types';
 import { PythonSettings } from '../common/configSettings';
 import { isTestExecution, STANDARD_OUTPUT_CHANNEL } from '../common/constants';
 import { createDeferred, Deferred } from '../common/helpers';
 import { IFileSystem, IPlatformService } from '../common/platform/types';
 import { StopWatch } from '../common/stopWatch';
-import { BANNER_NAME_LS_SURVEY, IConfigurationService, IExtensionContext, ILogger,
-    IOutputChannel, IPythonExtensionBanner, IPythonSettings } from '../common/types';
+import {
+    BANNER_NAME_LS_SURVEY, IConfigurationService, IExtensionContext, ILogger,
+    IOutputChannel, IPythonExtensionBanner, IPythonSettings
+} from '../common/types';
 import { IServiceContainer } from '../ioc/types';
 import {
     PYTHON_LANGUAGE_SERVER_DOWNLOADED,