diff --git a/lib/solaar/custom_logger.py b/lib/solaar/custom_logger.py
new file mode 100644
index 000000000..a4337bf17
--- /dev/null
+++ b/lib/solaar/custom_logger.py
@@ -0,0 +1,28 @@
+import logging
+
+
+class CustomLogger(logging.Logger):
+    """Logger, that avoids unnecessary string computations.
+
+    Does not compute messages for disabled log levels.
+    """
+
+    def debug(self, msg, *args, **kwargs):
+        if self.isEnabledFor(logging.DEBUG):
+            super().debug(msg, *args, **kwargs)
+
+    def info(self, msg, *args, **kwargs):
+        if self.isEnabledFor(logging.INFO):
+            super().info(msg, *args, **kwargs)
+
+    def warning(self, msg, *args, **kwargs):
+        if self.isEnabledFor(logging.WARNING):
+            super().warning(msg, *args, **kwargs)
+
+    def error(self, msg, *args, **kwargs):
+        if self.isEnabledFor(logging.ERROR):
+            super().error(msg, *args, **kwargs)
+
+    def critical(self, msg, *args, **kwargs):
+        if self.isEnabledFor(logging.CRITICAL):
+            super().critical(msg, *args, **kwargs)
diff --git a/lib/solaar/gtk.py b/lib/solaar/gtk.py
index 65ff13b9e..a5a57c751 100755
--- a/lib/solaar/gtk.py
+++ b/lib/solaar/gtk.py
@@ -36,7 +36,9 @@
 from solaar import dbus
 from solaar import listener
 from solaar import ui
+from solaar.custom_logger import CustomLogger
 
+logging.setLoggerClass(CustomLogger)
 logger = logging.getLogger(__name__)