Extremely slow execution of an external dependency function

It is though. This is the code:

let buf = Buffer.from(
         base64.replace(/^data:image\/\w+;base64,/, ""),
         "base64"
       );


const uploadParams = {
         Bucket: "BUCKETNAME",
         Body: BUFFERFILE,
         Key: fileName,
         ContentEncoding: "base64",
         ContentType: "image/jpeg",
       };

       s3.upload(uploadParams, function (err, data) {
         if (err) {
           console.log(err);
           console.log("Error uploading data: ", data);
         } else {
           console.log("succesfully uploaded the image!");
         }
       });