diff --git a/tools/progress.py b/tools/progress.py
new file mode 100644
index 00000000..70bfcf4d
--- /dev/null
+++ b/tools/progress.py
@@ -0,0 +1,128 @@
+import sys
+import os
+import re
+from pathlib import Path
+
+
+def eprint(*args, **kwargs):
+    print(*args, file=sys.stderr, **kwargs)
+
+
+def remove_whitespace(s: str):
+    return ''.join(s.split())
+
+
+def get_nonmatching_funcs(source: str):
+    # Example:
+    # ARM bool NONMATCH(ItemManager::func_ov00_020ad790)(unk32 param1)
+    #                   ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+    funcs = re.findall(r'NONMATCH\W*\(\W*([^\)]+)', source)
+    return [remove_whitespace(func) for func in funcs]
+
+
+def get_all_nonmatching_funcs():
+    funcs = []
+    for root, dirs, files in os.walk('src'):
+        for file in files:
+            name, ext = file.rsplit('.', 1)
+            if ext not in ['c', 'cpp']: continue
+            with open(os.path.join(root, file), 'r') as f:
+                source = f.read()
+            funcs.extend(get_nonmatching_funcs(source))
+    return set(funcs)
+
+
+class Section:
+    def __init__(self, name: str) -> None:
+        self.name = name
+        # Number of bytes from assembly, C/C++ and nonmatching code
+        # In total, they amount to the entire code
+        self.bytes_asm = 0
+        self.bytes_c_cpp = 0
+        self.bytes_nonmatch = 0
+    
+    def total(self):
+        return self.bytes_asm + self.bytes_c_cpp + self.bytes_nonmatch
+
+
+nonmatching_funcs = get_all_nonmatching_funcs()
+sections = ['.text', '.rodata', '.data', '.bss', '.init']
+sections = {name: Section(name) for name in sections}
+
+map_path = None
+regions = ['eur', 'usa']
+for region in regions:
+    map_path = Path(f'build/{region}/main.bin.xMAP')
+    if map_path.is_file(): break
+if map_path is None:
+    eprint('You must build the ROM first!')
+    exit(1)
+
+with open(f'build/{region}/main.bin.xMAP', 'r') as f:
+    line = '\n'
+    while len(line) > 0:
+        # 020AD090 00000028 .text   ItemManager::Create()	(ItemManager.cpp.o)
+        line = f.readline()
+        words = line.split()
+        if len(words) < 5: continue
+
+        # 020AD090
+        addr = words[0]
+        try: addr = int(addr, base=16)
+        except: continue
+
+        # 00000028
+        size = words[1]
+        try: size = int(size, base=16)
+        except: continue
+
+        # .text
+        section = words[2]
+        # Much of .sbss hasn't been defined yet, so group it together with .bss
+        if section == '.sbss': section = '.bss'
+        # .ctor and .init are coupled together
+        if section == '.ctor': section = '.init'
+        section = sections[section]
+
+        # ItemManager::Create()
+        func = words[3]
+        if func == '.text': continue
+        # ItemManager::Create
+        func = func.split('(', 1)[0]
+        is_nonmatch = func in nonmatching_funcs
+        if is_nonmatch: nonmatching_funcs.remove(func)
+
+        # (ItemManager.cpp.o)
+        file = words[-1]
+        if not file.startswith('('): continue
+        if not file.endswith(')'): continue
+        # ItemManager.cpp.o
+        file = file[1:-1]
+
+        is_asm = file.endswith('.s.o')
+        is_c_cpp = file.endswith('.c.o') or file.endswith('.cpp.o')
+        if not is_asm and not is_c_cpp:
+            eprint(f"Unknown file extension for '{file}'")
+            continue
+
+        if is_asm: section.bytes_asm += size
+        if is_c_cpp:
+            if is_nonmatch: section.bytes_nonmatch += size
+            else: section.bytes_c_cpp += size
+
+if len(nonmatching_funcs) > 0:
+    eprint('Some nonmatching functions were not found in the map file:')
+    eprint('\n'.join(list(nonmatching_funcs)))
+    eprint()
+
+for name, section in sections.items():
+    total = section.total()
+    percent_asm = 100 * (section.bytes_asm / total)
+    percent_c_cpp = 100 * (section.bytes_c_cpp / total)
+    percent_nonmatch = 100 * (section.bytes_nonmatch / total)
+
+    print(f'{name}:')
+    print(f'  asm      = {section.bytes_asm:7} bytes ({percent_asm:7.3f}%)')
+    print(f'  C/C++    = {section.bytes_c_cpp:7} bytes ({percent_c_cpp:7.3f}%)')
+    print(f'  nonmatch = {section.bytes_nonmatch:7} bytes ({percent_nonmatch:7.3f}%)')
+    print()