ssz: bump for 10% hash_tree_root perf increase, json loading fix (#5292)

* move file loading out of timed ncli section to focus benchmark on
deserialization rather than disk loading
* JSON loading fix included in bump, but does not practically happen
since we generally don't load hashlist from JSON

ncli/ncli.nim

@@ -96,10 +96,10 @@ template saveSSZFile(filename: string, value: ForkedHashedBeaconState) =
   of ConsensusFork.Capella:   SSZ.saveFile(filename, value.capellaData.data)
   of ConsensusFork.Deneb:     SSZ.saveFile(filename, value.denebData.data)
 
-proc loadFile(filename: string, T: type): T =
+proc loadFile(filename: string, bytes: openArray[byte], T: type): T =
   let
     ext = splitFile(filename).ext
-    bytes = readAllBytes(filename).expect("file exists")
+
   if cmpIgnoreCase(ext, ".ssz") == 0:
     SSZ.decode(bytes, T)
   elif cmpIgnoreCase(ext, ".ssz_snappy") == 0:
@@ -187,11 +187,12 @@ proc doSSZ(conf: NcliConf) =
     of pretty: (conf.prettyKind, conf.prettyFile)
     else:
       raiseAssert "doSSZ() only implements hashTreeRoot and pretty commands"
+  let bytes = readAllBytes(file).expect("file exists")
 
   template printit(t: untyped) {.dirty.} =
 
     let v = withTimerRet(timers[tLoad]):
-      newClone(loadFile(file, t))
+      newClone(loadFile(file, bytes, t))
 
     case conf.cmd:
     of hashTreeRoot:

vendor/nim-ssz-serialization

@@ -1 +1 @@
-Subproject commit c6aa85e1f59076eeabafa607ab8489f95fdbba20
+Subproject commit 3b1f866e419527fdd4b36d054e94678c3035b879