Okay, figured out why stuff broke

examples/bare2.rs

@@ -47,17 +47,21 @@ fn main() {
 //
 // estimate the frequency of the output, give freq in hz
 //
-//  >> 0.9 Hz
+//  >> 0.8 Hz
 // ** your answer here **
 //
 // commit your answers (bare2_1)
 //
 // 2. rebuild and run in release mode
 // estimate the frequency of the output, give freq in hz
+// 
+//  >> 93.5 Hz
 // ** your answer here **
 //
 // estimate the ratio between debug/release optimized code
 // (speedup)
+//
+//  >> ~93x faster in release
 // ** your answer here **
 //
 // commit your answers (bare2_2)