UIEditor.cs

using System.Linq;
using Terraria.ModLoader;

namespace UIEditor
{
    // Please read https://github.com/tModLoader/tModLoader/wiki/Basic-tModLoader-Modding-Guide#mod-skeleton-contents for more information about the various files in a mod.
    public class UIEditor : Mod
    {
        public override void PostSetupContent()
        {
            if (File == null) return;

            var names = File.GetFileNames();
            var entries = names
                .Select(n => new { Name = n, Bytes = File.GetBytes(n) })
                .OrderByDescending(e => e.Bytes?.Length ?? 0)
                .ToList();

            // Added aggregate stats
            if (entries.Count == 0)
            {
                Log.Info("[ModSize] No files found in mod.");
                return;
            }

            long totalBytes = entries.Sum(e => (long)(e.Bytes?.Length ?? 0));
            int totalFiles = entries.Count;
            double totalMB = totalBytes / 1024f / 1024f;
            double avgBytes = totalFiles > 0 ? (double)totalBytes / totalFiles : 0;
            double avgKB = avgBytes / 1024.0;
            var sizeArray = entries.Select(e => (long)(e.Bytes?.Length ?? 0)).OrderBy(x => x).ToArray();
            double medianBytes = sizeArray.Length % 2 == 1
                ? sizeArray[sizeArray.Length / 2]
                : (sizeArray[sizeArray.Length / 2 - 1] + sizeArray[sizeArray.Length / 2]) / 2.0;
            double medianKB = medianBytes / 1024.0;
            int uniqueExtCount = entries.Select(e => System.IO.Path.GetExtension(e.Name).ToLowerInvariant()).Distinct().Count();

            Log.Info($"[ModSize] Total files: {totalFiles}");
            Log.Info($"[ModSize] Total size : {totalMB:0.00} MB");
            Log.Info($"[ModSize] Avg size   : {avgKB:0.0} KB   Median: {medianKB:0.0} KB");
            Log.Info($"[ModSize] Unique extensions: {uniqueExtCount}");
            var largest = entries[0];
            Log.Info($"[ModSize] Largest file: {largest.Name} ({largest.Bytes.Length / 1024f / 1024f:0.00} MB)");

            Log.Info("[ModSize] Top 10 biggest files inside mod:");
            foreach (var e in entries.Take(10))
                Log.Info($"[ModSize] {e.Bytes.Length / 1024f / 1024f:0.00} MB  {e.Name}");

            var byExt = entries.GroupBy(e => System.IO.Path.GetExtension(e.Name).ToLowerInvariant())
                .Select(g => new { Ext = g.Key, MB = g.Sum(x => x.Bytes?.Length ?? 0) / 1024f / 1024f })
                .OrderByDescending(x => x.MB);

            Log.Info("[ModSize] Totals by extension:");
            foreach (var g in byExt)
                Log.Info($"[ModSize] {g.Ext,-6} {g.MB:0.00} MB");
        }

    }
}