miri can't handle lots of iterations

Author: jonhoo

tests/hasher.rs

@@ -23,7 +23,7 @@ impl BuildHasher for ZeroHashBuilder {
 }
 
 fn check<S: BuildHasher + Default>() {
-    let range = 0..1000;
+    let range = if cfg!(miri) { 0..16 } else { 0..1000 };
     let guard = epoch::pin();
     let map = HashMap::<i32, i32, S>::default();
     for i in range.clone() {

tests/jdk/map_check.rs

@@ -3,8 +3,17 @@ use flurry::*;
 use rand::prelude::*;
 use std::hash::Hash;
 
+#[cfg(not(miri))]
 const SIZE: usize = 50_000;
+#[cfg(miri)]
+const SIZE: usize = 12;
+
+// there must be more things absent than present!
+#[cfg(not(miri))]
 const ABSENT_SIZE: usize = 1 << 17;
+#[cfg(miri)]
+const ABSENT_SIZE: usize = 1 << 5;
+
 const ABSENT_MASK: usize = ABSENT_SIZE - 1;
 
 fn t1<K, V>(map: &HashMap<K, V>, keys: &[K], expect: usize)