Use gperf - not faster yet

src/json_token_enum.hpp

@@ -0,0 +1,33 @@
+#pragma once
+
+enum class JsonTokenType {
+  Unknown = 0,
+  Preconditions = 1,
+  Operations = 2,
+  RequestId = 3,
+  LeaderId = 4,
+  ReadVersion = 5,
+  Type = 6,
+  Key = 7,
+  Begin = 8,
+  End = 9,
+  Value = 10,
+  Version = 11,
+  PointRead = 12,
+  RangeRead = 13,
+  Write = 14,
+  Delete = 15,
+  RangeDelete = 16
+};
+
+#include "json_tokens.hpp"
+#include <string_view>
+
+inline JsonTokenType get_json_token_type(std::string_view str) {
+  const JsonToken *token =
+      Perfect_Hash::lookup_json_token(str.data(), str.size());
+  if (token && token->name[0] != '\0') { // Check that we got a valid token
+    return static_cast<JsonTokenType>(token->token_id);
+  }
+  return JsonTokenType::Unknown;
+}