diff --git a/buildbot/worker/doc_manual.py b/buildbot/worker/doc_manual.py
index 223db9c..9e0be4b 100755
--- a/buildbot/worker/doc_manual.py
+++ b/buildbot/worker/doc_manual.py
@@ -9,8 +9,10 @@ import os
 import pathlib
 import re
 import sys
+import time
 
 from collections import OrderedDict
+from datetime import timedelta
 from typing import Callable, Optional, Sequence
 
 sys.path.append(str(pathlib.Path(__file__).resolve().parent.parent))
@@ -94,6 +96,7 @@ def compile_doc(builder: ManualBuilder) -> None:
 
     # Generate manual
     for locale in locales:
+        start_timestamp = time.time()
         worker.utils.info(f"Generating {locale} in {doc_format}")
 
         num_threads = worker.configure.get_thread_count(thread_memory_in_GB=1.25)
@@ -139,6 +142,10 @@ def compile_doc(builder: ManualBuilder) -> None:
         )
         version_switch_file_path.write_text(version_switch_text)
 
+        time_total = time.time() - start_timestamp
+        time_delta = str(timedelta(seconds=time_total))
+        worker.utils.info(f"Generated {locale} in {doc_format} in {time_delta}")
+
 
 def package(builder: ManualBuilder) -> None:
     if not builder.needs_package_delivery: