Limit number of rsvg threads.

librsvg uses rayon (rust) for parallelism. By default the number
of threads spawned is up to the number of logical CPU cores,
which is excessive, as they never get released once spawned.

Author: mtwebster

usr/lib/linuxmint/mintinstall/mintinstall.py

@@ -3171,5 +3171,9 @@ def _adjust_position(self):
 
 if __name__ == "__main__":
     os.system("mkdir -p %s" % imaging.SCREENSHOT_DIR)
+
+    if os.environ.get("RAYON_NUM_THREADS") is None:
+        os.environ["RAYON_NUM_THREADS"] = "2"
+
     app = Application()
     app.run(sys.argv)