tests: Reduce large object allocations so tests can run with small heap.

tests/basics/dict1.py

@@ -12,7 +12,7 @@ print(d)
 print(d[1])
 
 x = 1
-while x < 1000:
+while x < 100:
     d[x] = x
     x += 1
-print(d[500])
+print(d[50])

tests/basics/dict_copy.py

-a = {i: 2*i for i in range(1000)}
+a = {i: 2*i for i in range(100)}
 b = a.copy()
-for i in range(1000):
+for i in range(100):
     print(i, b[i])
 print(len(b))

tests/basics/enumerate.py

@@ -2,7 +2,7 @@ print(list(enumerate([])))
 print(list(enumerate([1, 2, 3])))
 print(list(enumerate([1, 2, 3], 5)))
 print(list(enumerate([1, 2, 3], -5)))
-print(list(enumerate(range(1000))))
+print(list(enumerate(range(100))))
 
 # specifying args with keywords
 print(list(enumerate([1, 2, 3], start=1)))

tests/basics/list_sort.py

@@ -27,7 +27,7 @@ print(l)
 print(l == sorted(l, reverse=False))
 
 # test large lists (should not stack overflow)
-l = list(range(2000))
+l = list(range(200))
 l.sort()
 print(l[0], l[-1])
 l.sort(reverse=True)