diff --git a/pkg/analysis_server/lib/protocol/protocol_constants.dart b/pkg/analysis_server/lib/protocol/protocol_constants.dart
index 2689506f371..85a4474eac5 100644
--- a/pkg/analysis_server/lib/protocol/protocol_constants.dart
+++ b/pkg/analysis_server/lib/protocol/protocol_constants.dart
@@ -141,6 +141,7 @@ const String COMPLETION_REQUEST_GET_SUGGESTIONS2 = 'completion.getSuggestions2';
 const String COMPLETION_REQUEST_GET_SUGGESTIONS2_FILE = 'file';
 const String COMPLETION_REQUEST_GET_SUGGESTIONS2_MAX_RESULTS = 'maxResults';
 const String COMPLETION_REQUEST_GET_SUGGESTIONS2_OFFSET = 'offset';
+const String COMPLETION_REQUEST_GET_SUGGESTIONS2_TIMEOUT = 'timeout';
 const String COMPLETION_REQUEST_GET_SUGGESTIONS_FILE = 'file';
 const String COMPLETION_REQUEST_GET_SUGGESTIONS_OFFSET = 'offset';
 const String COMPLETION_REQUEST_GET_SUGGESTION_DETAILS =
diff --git a/pkg/analysis_server/lib/protocol/protocol_generated.dart b/pkg/analysis_server/lib/protocol/protocol_generated.dart
index 8cd904d16f8..082036f72f7 100644
--- a/pkg/analysis_server/lib/protocol/protocol_generated.dart
+++ b/pkg/analysis_server/lib/protocol/protocol_generated.dart
@@ -4698,7 +4698,14 @@ class CompletionGetSuggestions2Params implements RequestParams {
   /// to true.
   int maxResults;
 
-  CompletionGetSuggestions2Params(this.file, this.offset, this.maxResults);
+  /// The approximate time in milliseconds that the server should spend. The
+  /// server will perform some steps anyway, even if it takes longer than the
+  /// specified timeout. This field is intended to be used for benchmarking,
+  /// and usually should not be provided, so that the default timeout is used.
+  int? timeout;
+
+  CompletionGetSuggestions2Params(this.file, this.offset, this.maxResults,
+      {this.timeout});
 
   factory CompletionGetSuggestions2Params.fromJson(
       JsonDecoder jsonDecoder, String jsonPath, Object? json) {
@@ -4723,7 +4730,12 @@ class CompletionGetSuggestions2Params implements RequestParams {
       } else {
         throw jsonDecoder.mismatch(jsonPath, 'maxResults');
       }
-      return CompletionGetSuggestions2Params(file, offset, maxResults);
+      int? timeout;
+      if (json.containsKey('timeout')) {
+        timeout = jsonDecoder.decodeInt(jsonPath + '.timeout', json['timeout']);
+      }
+      return CompletionGetSuggestions2Params(file, offset, maxResults,
+          timeout: timeout);
     } else {
       throw jsonDecoder.mismatch(
           jsonPath, 'completion.getSuggestions2 params', json);
@@ -4741,6 +4753,10 @@ class CompletionGetSuggestions2Params implements RequestParams {
     result['file'] = file;
     result['offset'] = offset;
     result['maxResults'] = maxResults;
+    var timeout = this.timeout;
+    if (timeout != null) {
+      result['timeout'] = timeout;
+    }
     return result;
   }
 
@@ -4757,7 +4773,8 @@ class CompletionGetSuggestions2Params implements RequestParams {
     if (other is CompletionGetSuggestions2Params) {
       return file == other.file &&
           offset == other.offset &&
-          maxResults == other.maxResults;
+          maxResults == other.maxResults &&
+          timeout == other.timeout;
     }
     return false;
   }
@@ -4767,6 +4784,7 @@ class CompletionGetSuggestions2Params implements RequestParams {
         file,
         offset,
         maxResults,
+        timeout,
       );
 }
 
diff --git a/pkg/analysis_server/lib/src/domain_completion.dart b/pkg/analysis_server/lib/src/domain_completion.dart
index cfc49ebba7a..60c81b6a84b 100644
--- a/pkg/analysis_server/lib/src/domain_completion.dart
+++ b/pkg/analysis_server/lib/src/domain_completion.dart
@@ -267,12 +267,17 @@ class CompletionDomainHandler extends AbstractRequestHandler {
 
   /// Implement the 'completion.getSuggestions2' request.
   void getSuggestions2(Request request) async {
-    var budget = CompletionBudget(budgetDuration);
-
     var params = CompletionGetSuggestions2Params.fromRequest(request);
     var file = params.file;
     var offset = params.offset;
 
+    var timeoutMilliseconds = params.timeout;
+    var budget = CompletionBudget(
+      timeoutMilliseconds != null
+          ? Duration(milliseconds: timeoutMilliseconds)
+          : budgetDuration,
+    );
+
     var provider = server.resourceProvider;
     var pathContext = provider.pathContext;
 
diff --git a/pkg/analysis_server/test/integration/support/integration_test_methods.dart b/pkg/analysis_server/test/integration/support/integration_test_methods.dart
index 9a707cfd852..aa0d470a9a4 100644
--- a/pkg/analysis_server/test/integration/support/integration_test_methods.dart
+++ b/pkg/analysis_server/test/integration/support/integration_test_methods.dart
@@ -1020,9 +1020,11 @@ abstract class IntegrationTestMixin {
   ///   True if the number of suggestions after filtering was greater than the
   ///   requested maxResults.
   Future<CompletionGetSuggestions2Result> sendCompletionGetSuggestions2(
-      String file, int offset, int maxResults) async {
-    var params =
-        CompletionGetSuggestions2Params(file, offset, maxResults).toJson();
+      String file, int offset, int maxResults,
+      {int? timeout}) async {
+    var params = CompletionGetSuggestions2Params(file, offset, maxResults,
+            timeout: timeout)
+        .toJson();
     var result = await server.send('completion.getSuggestions2', params);
     var decoder = ResponseDecoder(null);
     return CompletionGetSuggestions2Result.fromJson(decoder, 'result', result);
diff --git a/pkg/analysis_server/test/integration/support/protocol_matchers.dart b/pkg/analysis_server/test/integration/support/protocol_matchers.dart
index 5fd8c3cfaf1..70848d4a6ba 100644
--- a/pkg/analysis_server/test/integration/support/protocol_matchers.dart
+++ b/pkg/analysis_server/test/integration/support/protocol_matchers.dart
@@ -2139,7 +2139,8 @@ final Matcher isCompletionGetSuggestionDetailsResult = LazyMatcher(() =>
 /// }
 final Matcher isCompletionGetSuggestions2Params = LazyMatcher(() =>
     MatchesJsonObject('completion.getSuggestions2 params',
-        {'file': isFilePath, 'offset': isInt, 'maxResults': isInt}));
+        {'file': isFilePath, 'offset': isInt, 'maxResults': isInt},
+        optionalFields: {'timeout': isInt}));
 
 /// completion.getSuggestions2 result
 ///
diff --git a/pkg/analysis_server/tool/spec/generated/java/AnalysisServer.java b/pkg/analysis_server/tool/spec/generated/java/AnalysisServer.java
index 9f7e268f747..21085163fc0 100644
--- a/pkg/analysis_server/tool/spec/generated/java/AnalysisServer.java
+++ b/pkg/analysis_server/tool/spec/generated/java/AnalysisServer.java
@@ -441,8 +441,12 @@ public interface AnalysisServer {
    * @param offset The offset within the file at which suggestions are to be made.
    * @param maxResults The maximum number of suggestions to return. If the number of suggestions
    *         after filtering is greater than the maxResults, then isIncomplete is set to true.
+   * @param timeout The approximate time in milliseconds that the server should spend. The server
+   *         will perform some steps anyway, even if it takes longer than the specified timeout. This
+   *         field is intended to be used for benchmarking, and usually should not be provided, so
+   *         that the default timeout is used.
    */
-  public void completion_getSuggestions2(String file, int offset, int maxResults, GetSuggestions2Consumer consumer);
+  public void completion_getSuggestions2(String file, int offset, int maxResults, int timeout, GetSuggestions2Consumer consumer);
 
   /**
    * {@code completion.registerLibraryPaths}
diff --git a/pkg/analysis_server/tool/spec/spec_input.html b/pkg/analysis_server/tool/spec/spec_input.html
index aa08d7450a5..d89a44b8f07 100644
--- a/pkg/analysis_server/tool/spec/spec_input.html
+++ b/pkg/analysis_server/tool/spec/spec_input.html
@@ -1482,6 +1482,16 @@
           then <tt>isIncomplete</tt> is set to <tt>true</tt>.
         </p>
       </field>
+      <field name="timeout" experimental="true" optional="true">
+        <ref>int</ref>
+        <p>
+          The approximate time in milliseconds that the server should spend.
+          The server will perform some steps anyway, even if it takes longer
+          than the specified timeout. This field is intended to be used for
+          benchmarking, and usually should not be  provided, so that the
+          default timeout is used.
+        </p>
+      </field>
     </params>
     <result>
       <field name="replacementOffset">
diff --git a/pkg/analysis_server_client/lib/src/protocol/protocol_constants.dart b/pkg/analysis_server_client/lib/src/protocol/protocol_constants.dart
index 2689506f371..85a4474eac5 100644
--- a/pkg/analysis_server_client/lib/src/protocol/protocol_constants.dart
+++ b/pkg/analysis_server_client/lib/src/protocol/protocol_constants.dart
@@ -141,6 +141,7 @@ const String COMPLETION_REQUEST_GET_SUGGESTIONS2 = 'completion.getSuggestions2';
 const String COMPLETION_REQUEST_GET_SUGGESTIONS2_FILE = 'file';
 const String COMPLETION_REQUEST_GET_SUGGESTIONS2_MAX_RESULTS = 'maxResults';
 const String COMPLETION_REQUEST_GET_SUGGESTIONS2_OFFSET = 'offset';
+const String COMPLETION_REQUEST_GET_SUGGESTIONS2_TIMEOUT = 'timeout';
 const String COMPLETION_REQUEST_GET_SUGGESTIONS_FILE = 'file';
 const String COMPLETION_REQUEST_GET_SUGGESTIONS_OFFSET = 'offset';
 const String COMPLETION_REQUEST_GET_SUGGESTION_DETAILS =
diff --git a/pkg/analysis_server_client/lib/src/protocol/protocol_generated.dart b/pkg/analysis_server_client/lib/src/protocol/protocol_generated.dart
index 2dcbd32b065..2ebd67f4bb3 100644
--- a/pkg/analysis_server_client/lib/src/protocol/protocol_generated.dart
+++ b/pkg/analysis_server_client/lib/src/protocol/protocol_generated.dart
@@ -4698,7 +4698,14 @@ class CompletionGetSuggestions2Params implements RequestParams {
   /// to true.
   int maxResults;
 
-  CompletionGetSuggestions2Params(this.file, this.offset, this.maxResults);
+  /// The approximate time in milliseconds that the server should spend. The
+  /// server will perform some steps anyway, even if it takes longer than the
+  /// specified timeout. This field is intended to be used for benchmarking,
+  /// and usually should not be provided, so that the default timeout is used.
+  int? timeout;
+
+  CompletionGetSuggestions2Params(this.file, this.offset, this.maxResults,
+      {this.timeout});
 
   factory CompletionGetSuggestions2Params.fromJson(
       JsonDecoder jsonDecoder, String jsonPath, Object? json) {
@@ -4723,7 +4730,12 @@ class CompletionGetSuggestions2Params implements RequestParams {
       } else {
         throw jsonDecoder.mismatch(jsonPath, 'maxResults');
       }
-      return CompletionGetSuggestions2Params(file, offset, maxResults);
+      int? timeout;
+      if (json.containsKey('timeout')) {
+        timeout = jsonDecoder.decodeInt(jsonPath + '.timeout', json['timeout']);
+      }
+      return CompletionGetSuggestions2Params(file, offset, maxResults,
+          timeout: timeout);
     } else {
       throw jsonDecoder.mismatch(
           jsonPath, 'completion.getSuggestions2 params', json);
@@ -4741,6 +4753,10 @@ class CompletionGetSuggestions2Params implements RequestParams {
     result['file'] = file;
     result['offset'] = offset;
     result['maxResults'] = maxResults;
+    var timeout = this.timeout;
+    if (timeout != null) {
+      result['timeout'] = timeout;
+    }
     return result;
   }
 
@@ -4757,7 +4773,8 @@ class CompletionGetSuggestions2Params implements RequestParams {
     if (other is CompletionGetSuggestions2Params) {
       return file == other.file &&
           offset == other.offset &&
-          maxResults == other.maxResults;
+          maxResults == other.maxResults &&
+          timeout == other.timeout;
     }
     return false;
   }
@@ -4767,6 +4784,7 @@ class CompletionGetSuggestions2Params implements RequestParams {
         file,
         offset,
         maxResults,
+        timeout,
       );
 }