Improve generator performance by bypassing std::vector checks.

maxsharabayko · Nov 26, 2024 · 633eb69 · 633eb69
1 parent 45eca3e
commit 633eb69
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/xtransmit/metrics.hpp b/xtransmit/metrics.hpp
@@ -50,7 +50,8 @@ namespace metrics
 		inline void generate_payload(vector<char>& payload)
 		{
 			const int seqno = m_seqno++;
-			iota(payload.begin(), payload.end(), static_cast<char>(seqno));
+			// Using data() instead of begin() significantly improves performance. See #104.
+			iota(payload.data(), payload.data() + payload.size(), static_cast<char>(seqno));
 			if (!m_enable_metrics)
 				return;