Switch CI to run in release mode.

This patch switches the CI script to run tests in release mode.
On my machine `cargo test --release` takes about 3.5 mins,
which is ok. Ideally, we would just enable release mode for
the one test where it matters, but it does not look like either the
build.rs API or cargo proper support that yet. Someone with
more knowledge might correct me.

Author: Ethan Pailes

ci/script.sh

@@ -17,15 +17,11 @@ if [ "$TRAVIS_RUST_VERSION" = "1.12.0" ]; then
   exit
 fi
 
-if [ "$TRAVIS_EVENT_TYPE" = "cron" ]; then
-    export RUST_REGEX_RUN_RANDOM_TESTING=1
-fi
-
 # Run tests. If we have nightly, then enable our nightly features.
 if [ "$TRAVIS_RUST_VERSION" = "nightly" ]; then
-  cargo test --verbose --features unstable
+  cargo test --release --verbose --features unstable
 else
-  cargo test --verbose
+  cargo test --release --verbose
 fi
 
 # Run a test that confirms the shootout benchmarks are correct.

tests/test_crates_regex.rs

@@ -49,12 +49,9 @@ mod crates_regex {
             fn $test_name() {
                 use super::consistent::backends_are_consistent;
 
-                let run_random = option_env!("RUST_REGEX_RUN_RANDOM_TESTING");
-                if run_random.is_some() {
-                    match backends_are_consistent($regex_src) {
-                        Ok(_) => {},
-                        Err(err) => panic!("{}", err),
-                    }
+                match backends_are_consistent($regex_src) {
+                    Ok(_) => {},
+                    Err(err) => panic!("{}", err),
                 }
             }
         }