https://bz.apache.org/bugzilla/show_bug.cgi?id=67080
--- Comment #3 from John Engebretson <jeng...@amazon.com> ---
I used javap to examine the bytecode of the reproducer - the full output is
attached but the critical portion is below. In short, it hashes each constant
and switches based on that hash.
This is superior to binary search because it's constant-time and superior to
HashMap because there is no object instantiation/traversal.
protected void runNewTest();
descriptor: ()V
flags: (0x0004) ACC_PROTECTED
Code:
stack=5, locals=5, args_size=1
0: iconst_m1
1: istore_1
2: iconst_0
3: istore_2
4: goto 363
7: getstatic #40 // Field
TEST_SCOPES:[Ljava/lang/String;
10: iload_2
11: aaload
12: astore_3
13: aload_3
14: dup
15: astore 4
17: invokevirtual #62 // Method
java/lang/String.hashCode:()I
20: lookupswitch { // 11
-1354757532: 120
-1221270899: 133
-697829026: 146
-272077475: 159
-214877152: 172
-10806556: 185
106436749: 198
872295685: 211
889144335: 224
1291689221: 237
2073857551: 250
default: 324
}
120: aload 4
122: ldc #18 // String cookie
124: invokevirtual #66 // Method
java/lang/String.equals:(Ljava/lang/Object;)Z
127: ifne 294
130: goto 324
133: aload 4
135: ldc #20 // String header
137: invokevirtual #66 // Method
java/lang/String.equals:(Ljava/lang/Object;)Z
140: ifne 283
143: goto 324
146: aload 4
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