content: add permalink

content/posts/bench-time.md

@@ -11,6 +11,8 @@ title: Eliminating A Source of Measurement Errors in Benchmarks
 
 Author(s): [Changkun Ou](https://changkun.de)
 
+Permalink: https://golang.design/research/bench-time
+
 About six months ago, I did a [presentation](https://golang.design/s/gobench)
 that talks about how to conduct a reliable benchmark in Go.
 Recently, I submitted an issue [#41641](https://golang.org/issue/41641) to the Go project, which is also a subtle issue that you might need to address in some cases.

content/posts/pointer-params.md

@@ -11,6 +11,7 @@ title: Pointers Might Not Be Ideal for Parameters
 
 Author(s): [Changkun Ou](https://changkun.de)
 
+Permalink: https://golang.design/research/pointer-params
 
 We are aware that using pointers for passing parameters can avoid data copy,
 which will benefit the performance. Nevertheless, there are always some

content/posts/ultimate-channel.md

@@ -11,6 +11,8 @@ title: The Ultimate Channel Abstraction
 
 Author(s): [Changkun Ou](https://changkun.de)
 
+Permalink: https://golang.design/research/ultimate-channel
+
 Recently, I have been rethinking the programming patterns regarding computer graphics applications, and have been written a 3D graphics package in Go, called [polyred](https://poly.red).
 While I was designing the rendering execution pipeline, a tricky deadlock struggled with me for a long time and led to creating an unbounded channel as a workaround solution eventually.
 

content/posts/zero-alloc-call-sched.md

@@ -15,6 +15,8 @@ title: Scheduling Function Calls with Zero Allocation
 
 Author(s): [Changkun Ou](https://changkun.de)
 
+Permalink: https://golang.design/research/zero-alloc-call-sched
+
 GUI programming in Go is a little bit tricky. The infamous issue
 regarding interacting with legacy, GUI frameworks is that
 most graphics related APIs must be called from the main thread.