Pass processes to search space build call

Author: RalfG

ms2pip/core.py

@@ -432,7 +432,7 @@ def predict_library(
     else:
         raise ValueError("Either `fasta_file` or `config` must be provided.")
 
-    search_space.build()
+    search_space.build(processes=processes)
 
     # Convert to PSMList and filter by precursor m/z range
     psm_list = PSMList(psm_list=list(search_space))

ms2pip/search_space.py

@@ -257,14 +257,15 @@ def from_any(cls, _input: dict | str | Path | ProteomeSearchSpace) -> ProteomeSe
         else:
             raise ValueError("Search space must be a dict, str, Path, or ProteomeSearchSpace.")
 
-    def build(self, processes: int = 1):
+    def build(self, processes: int | None = None):
         """
         Build peptide search space from FASTA file.
 
         Parameters
         ----------
-        processes : int
-            Number of processes to use for parallelization.
+        processes
+            Number of processes to use for parallelization. Uses all available CPU cores by
+            default.
 
         """
         processes = processes if processes else multiprocessing.cpu_count()