diff --git a/TODO b/TODO
index 91c189f9..3f42ab42 100644
--- a/TODO
+++ b/TODO
@@ -3,9 +3,22 @@ Initiatives:
 Tier 1:
 - Performance - most likely need CPS optimization and closure elimination
 - pass larceny benchmarks (will require some bugfixes):
-  TODO: keep track of which ones will not run, and why
+
+  benchmarks that do not finish due to
+  missing features:
+    - gcbench.scm - Needed to manually import (srfi 9)
+    - mbrotZ.scm - No complex library
+    - read0.scm - needs open-input-string
+    - scheme.scm - Problem with (macro?) being a primitive and defined in application code
+    - slatex.scm - Need to handle more than one "args" argument to apply
+  crashes:
+    - compiler.scm - segfaults during compilation
+    - maze.scm - vector-ref invalid index -6
+    - nucleic.scm - Runs now, but segfaults
+    - simplex.scm - Compiles but quickly throws error Error: Divide by zero
 
   OK if test errors out if outputs directory is missing, chibi does the same thing.
+  List of all benchmarks, along with comments if they are failing:
 
     - ack.scm
     - array1.scm