diff --git a/classifier/js/spreadsheet.js b/classifier/js/spreadsheet.js
index 4b01f26..c77832d 100644
--- a/classifier/js/spreadsheet.js
+++ b/classifier/js/spreadsheet.js
@@ -755,10 +755,10 @@
             const { file, index } = modifiedFiles[i];
             
             try {
-                // Add small delay between operations to prevent race conditions
-                if (i > 0) {
-                    await new Promise(resolve => setTimeout(resolve, 200));
-                }
+                // No inter-operation delay: saveFile() is fully awaited and
+                // each iteration renames a distinct file, so the saves are
+                // already serialized. (The old 200ms sleep papered over an
+                // earlier missing-await bug, since fixed.)
                 
                 // Validate before saving
                 const newFilename = computeNewFilename(file, index);
@@ -801,8 +801,8 @@
                     errorCount++;
                     errors.push(`${zddc.joinExtension(file.originalFilename, file.extension)}: ${saveErr.message}`);
                     
-                    // Add delay after errors to let filesystem stabilize
-                    await new Promise(resolve => setTimeout(resolve, 300));
+                    // No post-error delay: each file is independent, so an
+                    // error on one doesn't require "settling" before the next.
                 }
             } catch (err) {
                 console.error(`Error processing file ${index}:`, err);