[skywalking-go] branch wu-sheng-patch-1 created (now cf680c2)

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      at cf680c2  Add explanation for extra payload

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     new cf680c2  Add explanation for extra payload

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[skywalking-go] 01/01: Add explanation for extra payload

[wu...@apache.org]

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wusheng pushed a commit to branch wu-sheng-patch-1
in repository https://gitbox.apache.org/repos/asf/skywalking-go.git

commit cf680c2b684b5ff53476d7dc64a69b3b5a3ad3c8
Author: 吴晟 Wu Sheng <wu...@foxmail.com>
AuthorDate: Thu May 4 20:26:47 2023 +0800

    Add explanation for extra payload
---
 docs/en/agent/performance-tests.md | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/docs/en/agent/performance-tests.md b/docs/en/agent/performance-tests.md
index c8a4618..ab6e5c9 100644
--- a/docs/en/agent/performance-tests.md
+++ b/docs/en/agent/performance-tests.md
@@ -92,4 +92,6 @@ In the tests, we used **1000 QPS** as a benchmark to stress test both the Consum
 * In the **non-Agent version**, the CPU usage was around **74%**, memory usage was **2.53%**, and the average response time for a single request was **4.18ms**.
 * In the **Agent-compiled version**, the CPU usage was around **81%**, memory usage was **2.61%**, and the average response time for a single request was **4.32ms**.
 
-From these results, we can conclude that after adding the Agent, **the CPU usage increased by about 9%, memory usage experienced almost no growth, and the average response time for requests increased by approximately 0.15ms**.
\ No newline at end of file
+From these results, we can conclude that after adding the Agent, **the CPU usage increased by about 9%, memory usage experienced almost no growth, and the average response time for requests increased by approximately 0.15ms**.
+
+Explanation, `approximately 0.15ms` is the in-band cost. The most of CPU(`extra 9%`) cost are due to the amount of out of band data being sent to the collectors from the application(consumer), which is 4000 spans/s in our test case.