Im having an issue with a custom editor script pausing the whole editor with the little applicaton.message?

I tried two seperate scripts to try a different approach and see which is easier to logically go about finding and it pauses on only one of them. I sat for at least a minute waiting for it to finish but it didn't. This is the code for the actual script that runs.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
 [ExecuteInEditMode]
 public class FaceFinder : MonoBehaviour
 {
     public Face[] faced;
   
     public void FindFaces()
     {
         List<Face> faces = new List<Face>();
         Mesh mesh = this.GetComponent<MeshFilter>().sharedMesh;
         Debug.Log("Finding");
         for(int i =0; i < mesh.triangles.Length; i += 3)
         {
             Vector3 v1 = mesh.vertices[mesh.triangles[i + 0]];
             Vector3 v2 = mesh.vertices[mesh.triangles[i + 1]];
             Vector3 v3 = mesh.vertices[mesh.triangles[i + 2]];
             Vector3[] sorted = returnOrdered(v1, v2, v3);
             Vector3 line1 = (sorted[1] - sorted[0]);
             Vector3 line2 = (sorted[1] - sorted[2]);
             Vector3 cross = Vector3.Cross(line2, line1);
 
             for (int j = 0; j < mesh.triangles.Length; i += 3)
             {
                 if (j != i)
                 {
                     Vector3 vertex1 = mesh.vertices[mesh.triangles[j + 0]];
                     Vector3 vertex2 = mesh.vertices[mesh.triangles[j + 1]];
                     Vector3 vertex3 = mesh.vertices[mesh.triangles[j + 2]];
                     Vector3[] sorted1 = returnOrdered(vertex1, vertex2, vertex3);
                     Vector3 line3 = (sorted[1] - sorted[0]);
                     Vector3 line4 = (sorted[1] - sorted[2]);
                     Vector3 cross2 = Vector3.Cross(line3, line4);
                     if (cross == cross2)
                     {
                         //Vector3[] matched = FindAndRemoveMatched(sorted, sorted1);
                         Face f = new Face();
                         Vector3[] matched = { v1, v2, v3, vertex1 };
                         f.vertices = matched;
                         f.triangles = new int[] { i, j };
                         faces.Add(f);
                     }
                 }
             }
         }
 
         faced = faces.ToArray();
     }
 
     public Vector3[] FindAndRemoveMatched(Vector3[] array1,Vector3[] array2)
     {
         List<Vector3> newList = new List<Vector3>();
         newList.AddRange(array1);
         newList.AddRange(array2);
         Vector3[] combined = newList.ToArray();
         
         for(int i =0; i < combined.Length; i++)
         {
             for(int k = i + 1; k < combined.Length; k++)
             {
                 if (combined[i] == combined[k])
                 {
                     newList.Remove(combined[i]);
                 }
                 
             }
         }
         Debug.Log(newList.Count);
         return newList.ToArray();
 
     }
     Vector3[] returnOrdered(Vector3 v1, Vector3 v2, Vector3 v3)
     {
         bool sorted = false;
         Vector3[] vecArry = new Vector3[3] { v1, v2, v3 };
         while (sorted == false)
         {
             sorted = true;
             for (int i = 0; i < vecArry.Length - 1; i++)
             {
                 if (vecArry[i].magnitude > vecArry[i + 1].magnitude)
                 {
                     vecArry[i] = vecArry[i + 1];
                     sorted = false;
                 }
             }
         }
 
         return vecArry;
     }
 }
 
 [System.Serializable]
 public class Face{
 
     public Vector3[] vertices;
     //Should only be two but whatever.
     public int[] triangles;
     public Face()
     {
 
     }
 
 }

Here is the script for the editor button former.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEditor;
 [CustomEditor(typeof(FaceFinder))]
 public class FaceFinderEditor : Editor
 {
     public override void OnInspectorGUI()
     {
         DrawDefaultInspector();
 
         FaceFinder generateField = (FaceFinder)target;
         if (GUILayout.Button("Find"))
         {
             generateField.FindFaces();
         }
 
 
     }
 }