added benchmark

tests/benchmark.py

@@ -0,0 +1,30 @@
+import os
+
+import blag
+from blag.blag import build
+
+
+def test_performance(args) -> None:
+    # create 1000 random markdown files in the content directory
+    with open(os.path.join(blag.__path__[0], "content", "testpage.md")) as fh:
+              markdown = fh.read()
+    for i in range(10000):
+        with open(f"content/{i}.md", "w") as f:
+            f.write(markdown)
+            f.write(str(i))
+
+    from time import time
+
+    t = time()
+    build(args)
+    print(time() - t)
+
+    import cProfile
+
+    t = time()
+    #cProfile.run("build(args)")
+    build(args)
+    print(time() - t)
+
+
+    1 / 0