redo benchmarks a bit

Author: vladdeSV

benchmark/bench_1.d

@@ -0,0 +1,169 @@
+module benchmark.benchmark;
+
+import std.stdio : writef, writeln, stdout;
+import std.conv : to, text;
+
+void main()
+{
+    writef("\033[2J");
+    writef("\033[1;1H");
+    stdout.flush();
+
+    immutable height = 60;
+    immutable repeatMultiplier = 10_000;
+    immutable repeat = (height * repeatMultiplier);
+
+    void delegate()[] benchmarks;
+
+    string[][] results;
+
+/+
+    benchmarks = [
+        () {
+            foreach (i; 0 .. repeat)
+            {
+                auto pos = (i % 2) + 1;
+                writef("\033[%d;%dH", pos, pos);
+            }
+
+            stdout.flush();
+        }, () {
+            foreach (i; 0 .. repeat)
+            {
+                auto pos = (i % 2) + 1;
+                writef("\033[%d;%dH", pos, pos);
+                stdout.flush();
+            }
+        }, () {
+            foreach (i; 0 .. repeatMultiplier)
+            {
+                string data = "";
+
+                foreach (j; 0 .. height)
+                {
+                    auto pos = ((j * i) % 2) + 1;
+                    data ~= text("\033[", pos, ";", pos, "H");
+                }
+
+                writef(data);
+            }
+        }, () {
+            foreach (i; 0 .. repeatMultiplier)
+            {
+                string data = "";
+
+                foreach (j; 0 .. height)
+                {
+                    auto pos = ((j * i) % 2) + 1;
+                    data ~= text("\033[", pos, ";", pos, "H");
+                }
+
+                writef(data);
+                stdout.flush();
+            }
+        }
+    ];
+    +/
+    
+
+    results ~= benchmark(benchmarks);
+
+    /+ sample output on github codespaces
+
+        1: 327 ms, 110 μs, and 7 hnsecs
+        2: 5 secs, 931 ms, 412 μs, and 9 hnsecs
+        3: 734 ms, 360 μs, and 3 hnsecs
+        4: 597 ms, 116 μs, and 7 hnsecs
+
+    +/
+
+    benchmarks = [
+        () {
+            foreach (i; 0 .. repeat)
+            {
+                auto character = ['1', '2'][i % 2];
+                writef("\033[1;1H%s                                                                              %s",
+                        character, character);
+            }
+        }, () {
+            foreach (i; 0 .. repeat)
+            {
+                auto character = ['1', '2'][i % 2];
+                writef("\033[1;1H%s\033[1;80H%s", character, character);
+            }
+        }, () {
+            foreach (i; 0 .. repeat)
+            {
+                auto character = ['1', '2'][i % 2];
+                writef("\033[1;1H%s %s", character, character);
+            }
+        }, () {
+            foreach (i; 0 .. repeat)
+            {
+                auto character = ['1', '2'][i % 2];
+                writef("\033[1;1H%s\033[1;3H%s", character, character);
+            }
+        }, () {
+            foreach (i; 0 .. repeat)
+            {
+                // 10 changed characters
+                auto character = ['1', '2'][i % 2];
+                writef("\033[1;1H%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s%s",
+                        character, " ", character, " ", character, " ",
+                        character, " ", character, " ", character, " ", character,
+                        " ", character, " ", character, " ", character);
+            }
+        }, () {
+            foreach (i; 0 .. repeat)
+            {
+                // 10 changed characters
+                auto character = ['1', '2'][i % 2];
+                writef("\033[1;1H%s\033[1;3H%s\033[1;5H%s\033[1;7H%s\033[1;9H%s\033[1;11H%s\033[1;13H%s\033[1;15H%s\033[1;17H%s\033[1;19H%s",
+                        character, character, character, character, character,
+                        character, character, character, character, character);
+            }
+        },
+    ];
+
+    results ~= benchmark(benchmarks);
+
+    printResults(results);
+}
+
+auto benchmark(void delegate()[] benchmarks)
+{
+    import std.datetime.stopwatch : StopWatch;
+
+    auto sw = StopWatch();
+    sw.stop();
+    sw.reset();
+
+    string[] results;
+    foreach (benchmark; benchmarks)
+    {
+        sw.reset();
+        sw.start();
+        benchmark();
+        sw.stop();
+        stdout.flush();
+        results ~= to!string(sw.peek);
+    }
+
+    return results;
+}
+
+void printResults(string[][] results)
+{
+    writef("\033[2J");
+    writef("\033[1;1H");
+    stdout.flush();
+    
+    foreach (r; results)
+    {
+        writeln;
+        foreach (n, string result; r)
+        {
+            writeln(n + 1, ": ", result);
+        }
+    }
+}