finalized benchmark

we compare the mtimes of src and dst

Makefile

@@ -67,7 +67,7 @@ manpage: $(VENV)
 
 .PHONY: benchmark
 benchmark: $(VENV)
-	$(BIN)/pytest --no-cov -s -rP tests/benchmark.py
+	$(BIN)/pytest --no-cov -capture=no -rA tests/benchmark.py
 
 .PHONY: clean
 clean:

blag/blag.py

@@ -323,6 +323,18 @@ def process_markdown(
     for src, dst in convertibles:
         logger.debug(f"Processing {src}")
 
+        # see first if the dst actually needs re-building. for that we compare
+        # the mtimes and assume mtime_dst > mtime_src means that it needs not
+        # to be rebuilt
+        if os.path.exists(f"{output_dir}/{dst}"):
+            mtime_src = os.stat(f"{input_dir}/{src}").st_mtime
+            mtime_dst = os.stat(f"{output_dir}/{dst}").st_mtime
+            if mtime_dst >= mtime_src:
+                logger.debug(
+                    "Skipping, as target exists and is newer than source."
+                )
+                continue
+
         with open(f"{input_dir}/{src}") as fh:
             body = fh.read()
 

tests/benchmark.py

@@ -1,15 +1,24 @@
+"""Benchmark the performance of the blag build command."""
+
+import logging
 import os
+from argparse import Namespace
+
+from pytest import LogCaptureFixture
 
 import blag
 from blag.blag import build
 
 
-def test_performance(args) -> None:
+def test_performance(args: Namespace, caplog: LogCaptureFixture) -> None:
-    FILES = 1000
+    """Test performance of the build command."""
-    print(f"Generating {FILES} files")
+    caplog.set_level(logging.ERROR)
+
+    FILES = 10000
+    print(f"Generating {FILES} markdown files")
     # create random markdown files in the content directory
     with open(os.path.join(blag.__path__[0], "content", "testpage.md")) as fh:
-              markdown = fh.read()
+        markdown = fh.read()
     for i in range(FILES):
         with open(f"content/{i}.md", "w") as f:
             f.write(markdown)
@@ -20,12 +29,9 @@ def test_performance(args) -> None:
     t = time()
     build(args)
     t_first = time() - t
-    print(t_first)
 
     t = time()
     build(args)
     t_second = time() - t
-    print(t_second)
     print(f"First run: {t_first:.2f}s, second run: {t_second:.2f}s")
     print(f"Speedup: {t_first/t_second:.2f}")
-