avoid memory alloc when padding (#1058)

also avoid stack state copy in test
2020-05-22 10:31:19 +02:00 · 2020-05-22 10:31:19 +02:00 · 681b399e2a
parent 80b8416305
commit 681b399e2a
1 changed files with 1 additions and 1 deletions
--- a/beacon_chain/ssz.nim
+++ b/beacon_chain/ssz.nim
@ -306,7 +306,7 @@ func mergeBranches(existing: Eth2Digest, newData: openarray[byte]): Eth2Digest =
    let paddingBytes = bytesPerChunk - newData.len
    if paddingBytes > 0:
      trs "USING ", paddingBytes, " PADDING BYTES"
-      h.update zeroChunk[0 ..< paddingBytes]
+      h.update zeroChunk.toOpenArray(0, paddingBytes - 1)
  trs "HASH RESULT ", result

 template mergeBranches(a, b: Eth2Digest): Eth2Digest =