diff --git a/2021/1.ts b/2021/1.ts
index 3e78035..016f299 100644
--- a/2021/1.ts
+++ b/2021/1.ts
@@ -1,4 +1,9 @@
-import { inputNumbers } from "./common.ts";
+import {
+  collectArray,
+  inputNumbers,
+  measureDuration,
+  preloadedAsyncIterator,
+} from "./common.ts";
 
 /** This solution is relatively simple. Keep track of the last depth we
  * measured in `lastDepth` (skipping the first line of input by defaulting it
@@ -21,7 +26,28 @@ export async function part1(
   }
   return increases;
 }
-console.log("Part 1", await part1(await inputNumbers("1")));
+const input1 = await inputNumbers("1");
+await measureDuration(async () =>
+  console.log("Part 1 Async Naive", await part1(input1))
+);
+const input1pre = await preloadedAsyncIterator(await inputNumbers("1"));
+await measureDuration(async () =>
+  console.log("Part 1 Preloaded", await part1(input1pre))
+);
+const input1pre2 = await preloadedAsyncIterator(await inputNumbers("1"));
+await measureDuration(async () =>
+  console.log("Part 1 via Part2's Method", await part2(input1pre2, 1))
+);
+
+const input1pre3 = await collectArray(await inputNumbers("1"));
+const p1t = window.performance.now();
+let answer = 0;
+for (let i = 1; i <= input1pre3.length - 1; i++) {
+  if (input1pre3[i] > input1pre3[i - 1]) answer++;
+}
+console.log("Part 1 Fast", answer);
+const p1t2 = window.performance.now();
+console.log(p1t2 - p1t, "ms");
 
 /** Since the windows we need to compare overlap, we really only need to
  * compare the values unique to each window, which will be the first of the
@@ -45,4 +71,15 @@ export async function part2(
   }
   return increases;
 }
-console.log("Part 2", await part2(await inputNumbers("1")));
+const input2 = await inputNumbers("1");
+await measureDuration(async () => console.log("Part 2", await part2(input2)));
+
+const input2f = await collectArray(await inputNumbers("1"));
+const p2t = window.performance.now();
+let answer2 = 0;
+for (let i = 2; i <= input2f.length - 1; i++) {
+  if (input2f[i] > input2f[i - 3]) answer2++;
+}
+console.log("Part 2 Fast", answer2);
+const p2t2 = window.performance.now();
+console.log(p2t2 - p2t, "ms");
diff --git a/2021/common.ts b/2021/common.ts
index 274f5f7..2c67753 100644
--- a/2021/common.ts
+++ b/2021/common.ts
@@ -5,6 +5,7 @@ export const XDG_CACHE_HOME = Deno.env.get("XDG_CACHE_HOME") ||
   path.join(HOME, ".config");
 
 const INPUT_CACHE_DIR = path.join(XDG_CACHE_HOME, "aoc2021");
+console.log(INPUT_CACHE_DIR);
 
 async function fileExists(filePath: string) {
   try {
@@ -84,3 +85,30 @@ export async function* asyncIterator<T>(
     yield v;
   }
 }
+
+export async function preloadedAsyncIterator<T>(
+  iterator: AsyncIterableIterator<T>,
+): Promise<AsyncIterableIterator<T>> {
+  const arr: T[] = [];
+  for await (const v of iterator) {
+    arr.push(v);
+  }
+  return asyncIterator(arr);
+}
+
+export async function measureDuration(cb: () => Promise<void>) {
+  const p1t = window.performance.now();
+  await cb();
+  const p1t2 = window.performance.now();
+  console.log(p1t2 - p1t, "ms");
+}
+
+export async function collectArray<T>(
+  iterator: AsyncIterableIterator<T>,
+): Promise<T[]> {
+  const arr: T[] = [];
+  for await (const v of iterator) {
+    arr.push(v);
+  }
+  return arr;
+}
diff --git a/2021/one.nim b/2021/one.nim
new file mode 100644
index 0000000..321c9ca
--- /dev/null
+++ b/2021/one.nim
@@ -0,0 +1,31 @@
+import std/[streams, strutils, sugar, strformat, times]
+
+iterator inputForDay(day: int): int =
+  var stream: FileStream = fmt"/home/daniel/.home/.config/aoc2021/{day}.input".openFileStream
+  for s in stream.lines():
+    yield s.parseInt
+
+proc part1(inputs: seq[int], dist=1): int =
+  result = 0
+  var i = dist
+  var x = inputs.len()-1
+  while i <= x:
+    if inputs[i] > inputs[i-dist]: inc result
+    inc i
+
+let dd1 = epochTime()
+var input = collect(newSeq):
+  for i in inputForDay(1): i
+
+let dd2 = epochTime()
+echo &"{(dd2 - dd1) * 1000} ms (to load input)"
+echo "Part 1"
+let d1 = epochTime()
+echo part1(input)
+let d2 = epochTime()
+echo &"{(d2 - d1) * 1000} ms (to calculate solution)"
+echo "Part 2"
+let d21 = epochTime()
+echo part1(input,3)
+let d22 = epochTime()
+echo &"{(d22 - d21) * 1000} ms (to calculate solution)"