diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 92cbe7e..4a35bd6 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -26,12 +26,12 @@ sphinx-build -M html docs/source docs/output
 ## Performance
 ### How to profile the code
 ```bash
-NUMBA_DISABLE_JIT=1 ./scripts/bash/profile.sh tests/examples/test_queens.py | more
+NUMBA_DISABLE_JIT=1 python -m "cProfile" -s time -m nucs.examples.queens | more
 ```
 
 ### How to measure the performance
 ```bash
-time NUMBA_CACHE_DIR=.numba/cache PYTHONPATH=. python tests/examples/test_queens.py -n 12
+time NUMBA_CACHE_DIR=.numba/cache PYTHONPATH=. python -m nucs.examples.queens -n 12 
 ```
 
 ## Package
diff --git a/ROADMAP.md b/ROADMAP.md
index b6fac16..4937787 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -15,7 +15,9 @@
 # Engine
 - choice points pruning
 - backtrackable propagator __state__
+- backtrackable list of entailed propagators
 - implement decision variables
+- disable offsets when not useful
 
 # Numba
 - use prange with parallel=True
@@ -26,3 +28,4 @@
 - installation : put links to examples (and not CSPLIB)
 - examples : link to github
 - improve usage of rst
+- document environment variables
\ No newline at end of file
diff --git a/nucs/examples/queens/__main__.py b/nucs/examples/queens/__main__.py
index 1b4996d..33dd712 100644
--- a/nucs/examples/queens/__main__.py
+++ b/nucs/examples/queens/__main__.py
@@ -8,7 +8,7 @@
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser()
-    parser.add_argument("-n", type=int, default=12)
+    parser.add_argument("-n", type=int, default=10)
     args = parser.parse_args()
     problem = QueensProblem(args.n)
     solver = BacktrackSolver(problem)
diff --git a/scripts/bash/profile.sh b/scripts/bash/profile.sh
deleted file mode 100755
index b2322db..0000000
--- a/scripts/bash/profile.sh
+++ /dev/null
@@ -1,4 +0,0 @@
-#!/bin/bash
-
-python -m "cProfile" -s time "$1"
-