> + private static int CHUNK_SIZE = 1024 * 1024;
> +
> + private final Payload payload;
> + private HashCode hash;
> + private HashCode treeHash;
> +
> + public TreeHasher(Payload payload) throws IOException {
> + this.payload = payload;
> + this.buildHashes();
> + }
> +
> + private static Queue<HashCode> hashQueue(Queue<HashCode> q) {
> + //Hash pairs of values and add them to the result queue.
> + Queue<HashCode> result = Lists.newLinkedList();
> + while (q.size() > 1) {
> +
> result.offer(Hashing.sha256().hashBytes(Bytes.concat(q.poll().asBytes(),
> q.poll().asBytes())));
Avoid object creation with:
```
result.offer(Hashing.sha256().newHasher()
.putBytes(q.poll().asBytes())
.putBytes(q.poll().asBytes())
.hash());
---
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https://github.com/jclouds/jclouds-labs-aws/pull/11/files#r13791772
