Add benchmarks for structural alphabet conversion

benchmarks/structure/benchmark_alphabet.py

@@ -0,0 +1,22 @@
+from pathlib import Path
+import pytest
+import biotite.structure.alphabet as strucalph
+import biotite.structure.io.pdbx as pdbx
+from tests.util import data_dir
+
+PDB_ID = "1aki"
+
+
+@pytest.fixture
+def atoms():
+    pdbx_file = pdbx.BinaryCIFFile.read(Path(data_dir("structure")) / f"{PDB_ID}.bcif")
+    return pdbx.get_structure(pdbx_file, model=1, include_bonds=True)
+
+
+@pytest.mark.benchmark
+@pytest.mark.parametrize("method", [strucalph.to_3di, strucalph.to_protein_blocks])
+def benchmark_structural_alphabet_methods(method, atoms):
+    """
+    Convert a structure to the given structural alphabet.
+    """
+    method(atoms)