add turtle benchmark and reorganize (#259)

benchmarks/gradient.nu

@@ -0,0 +1,41 @@
+# this script will print a blue gradient on the screen
+
+# We can get the terminal width and height now with term size
+# but we like to use the script as a benchmark, so let's keep
+# it a constant size for now
+let height = 40 # really need to get the terminal height here
+let width = 160  # really need to get the terminal width here
+let stamp = 'Nu'
+seq 0 $height | each { |row|
+    let row_data = (seq 0 $width | each { |col|
+        let fgcolor = (iter_inc 2 2 $col)
+        if $fgcolor > 200 && $fgcolor < 210 {
+            $"(ansi -e '48;2;0;0;')($fgcolor)m($stamp)(ansi -e '0m')"
+        } else {
+            $"(ansi -e '48;2;0;0;')($fgcolor)m(char sp)(ansi -e '0m')"
+        }
+    } | str collect)
+    $"($row_data)(char newline)"
+} | str collect
+
+def iter_inc [incr mult iter] {
+    $incr + $mult * $iter
+}
+
+
+# ╭────────────────────┬──────────────────────────────────────────────────────╮
+# │ version            │ 0.1.0                                                │
+# │ branch             │ main                                                 │
+# │ short_commit       │ ec94ca46                                             │
+# │ commit_hash        │ ec94ca46bb64f3aa95f1366d76d60da2ddc53782             │
+# │ commit_date        │ 2022-01-24 19:45:20 +00:00                           │
+# │ build_os           │ windows-x86_64                                       │
+# │ rust_version       │ rustc 1.58.1 (db9d1b20b 2022-01-20)                  │
+# │ rust_channel       │ stable-x86_64-pc-windows-msvc                        │
+# │ cargo_version      │ cargo 1.58.0 (f01b232bc 2022-01-19)                  │
+# │ pkg_version        │ 0.1.0                                                │
+# │ build_time         │ 2022-01-24 15:04:00 -06:00                           │
+# │ build_rust_channel │ debug                                                │
+# │ features           │ dataframe, default, which, zip                       │
+# │ installed_plugins  │ gstat, inc, nu-example-1, nu-example-2, nu-example-3 │
+# ╰────────────────────┴──────────────────────────────────────────────────────╯