Adjust test to have < 64k subjects to test skip logic.

Signed-off-by: Derek Collison <[email protected]>

server/filestore.go

@@ -6426,9 +6426,6 @@ func (fs *fileStore) LoadNextMsg(filter string, wc bool, start uint64, sm *Store
 				// We should not do this at all if we are already on the last block.
 				// Also if we are a wildcard do not check if large subject space.
 				const wcMaxSizeToCheck = 64 * 1024
-
-				// if len(blks) - 1 > N
-
 				if i == bi && i < len(fs.blks)-1 && (!wc || fs.psim.Size() < wcMaxSizeToCheck) {
 					nbi, err := fs.checkSkipFirstBlock(filter, wc, bi)
 					// Nothing available.

server/filestore_test.go

@@ -7760,7 +7760,7 @@ func Benchmark_FileStoreLoadNextMsgVerySparseMsgsLargeTail(b *testing.B) {
 	// Add in a bunch of msgs.
 	// We need to make sure we have a range of subjects that could kick in a linear scan.
 	for i := 0; i < 1_000_000; i++ {
-		subj := fmt.Sprintf("foo.%d.bar", rand.Intn(100_000)+2)
+		subj := fmt.Sprintf("foo.%d.bar", rand.Intn(64_000)+2)
 		fs.StoreMsg(subj, nil, msg)
 	}