diff --git a/core/tools/alloc.py b/core/tools/alloc.py
new file mode 100755
index 000000000..729acbee1
--- /dev/null
+++ b/core/tools/alloc.py
@@ -0,0 +1,82 @@
+#!/usr/bin/env python3
+
+from types import SimpleNamespace
+import click
+
+
+def parse_alloc_data(alloc_data):
+    parsed_data = {}
+    for line in alloc_data:
+        ident, allocs, calls = line.strip().split(" ")
+        allocs = int(allocs)
+        calls = int(calls)
+        filename, lineno = ident.split(":")
+        lineno = int(lineno)
+
+        filedata = parsed_data.setdefault(filename, {})
+        filedata[lineno] = {
+            "total_allocs": allocs,
+            "total_calls": calls,
+            "avg_allocs": allocs / calls,
+        }
+    return parsed_data
+
+
+@click.group()
+@click.pass_context
+@click.option("-a", "--alloc-data", type=click.File(), default="src/alloc_data.txt")
+@click.option("-t", "--type", type=click.Choice(("total", "avg")), default="avg")
+def cli(ctx, alloc_data, type):
+    ctx.obj = SimpleNamespace(data=parse_alloc_data(alloc_data), type=type)
+
+
+@cli.command()
+@click.pass_obj
+@click.argument("filename")
+def annotate(obj, filename):
+    if obj.type == "total":
+        alloc_str = lambda line: str(line["total_allocs"])
+    else:
+        alloc_str = lambda line: "{:.2f}".format(line["avg_allocs"])
+
+    if filename.startswith("src/"):
+        filename = filename[4:]
+    filedata = obj.data[filename]
+
+    linedata = {lineno: alloc_str(line) for lineno, line in filedata.items()}
+    maxlen = max(len(l) for l in linedata.values())
+
+    lineno = 0
+    for line in open("src/" + filename):
+        lineno += 1
+        linecount = linedata.get(lineno, "")
+        print(f"{linecount:>{maxlen}}  {line}", end="")
+
+
+@cli.command()
+@click.pass_obj
+@click.option("-r", "--reverse", is_flag=True)
+def list(obj, reverse):
+    if obj.type == "total":
+        field = "total_allocs"
+        field_fmt = "{}"
+    else:
+        field = "avg_allocs"
+        field_fmt = "{:.2f}"
+
+    file_sums = {
+        filename: sum(line[field] for line in lines.values())
+        for filename, lines in obj.data.items()
+    }
+
+    maxlen = max(len(field_fmt.format(l)) for l in file_sums.values())
+
+    for filename, file_sum in sorted(
+        file_sums.items(), key=lambda x: x[1], reverse=reverse
+    ):
+        num_str = field_fmt.format(file_sum)
+        print(f"{num_str:>{maxlen}}  {filename}")
+
+
+if __name__ == "__main__":
+    cli()