diff --git a/TODO.md b/TODO.md
index e836c02..cd38c12 100644
--- a/TODO.md
+++ b/TODO.md
@@ -1,7 +1,6 @@
 # TODO
 
 * Configuration, cli
-    * Config behind Arc in state?
 * Tests
 * extract_response_peers
     * Cleaner code
@@ -16,8 +15,13 @@
 * Performance
     * cpu-target=native good?
     * mialloc good?
+* Track received requests and sent responses, as well as bytes transferred,
+  in atomic u64 / usize (repurposed to hold f64 for bytes)?
 
 ## Don't do
 
-* Other HashMap hashers (such as SeaHash): seemingly not worthwhile (might be with AVX though)
-* `sendmmsg`: can't send to multiple socket addresses, so doesn't help
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+* Other HashMap hashers (such as SeaHash): seemingly not worthwhile (might be
+  with AVX though)
+* `sendmmsg`: can't send to multiple socket addresses, so doesn't help
+* Config behind Arc in state: it is likely better to be able to pass it around
+  without state
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