diff --git a/.vscode/settings.json b/.vscode/settings.json
index 9381e55..6a0417c 100755
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -2,7 +2,9 @@
     "cSpell.words": [
         "autochurch",
         "freevar",
+        "mdel",
         "onefile",
+        "Packrat",
         "pyparsing",
         "runstatus",
         "subvar"
diff --git a/README.md b/README.md
index 016d270..3df1778 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,6 @@
  - $\alpha$-equivalence check
  - Prettyprint functions (combine args, rename bound variables)
  - Write a nice README
- - Delete macros
  - Handle or avoid recursion errors
 
 ## Todo:
@@ -17,8 +16,7 @@
  - Warn when overwriting macro
  - Syntax highlighting: parenthesis, bound variables, macros, etc
  - Pin header to top of screen
- - Parser is a bit slow. Maybe we can do better?
- - pypi package
+ - PyPi package
 
 ## Mention in Docs
  - lambda functions only work with single-letter arguments
diff --git a/lamb/parser.py b/lamb/parser.py
index afeca05..b0a49d4 100755
--- a/lamb/parser.py
+++ b/lamb/parser.py
@@ -1,5 +1,8 @@
 import pyparsing as pp
 
+# Packrat gives a MAD speed boost.
+pp.ParserElement.enablePackrat()
+
 import lamb.tokens as tokens
 import lamb.utils as utils