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Loopdrome explains algorithms by running them. Every Short asks one question, like why bubble sort is so slow or how a slow sort can beat quick sort, and answers it with the algorithm's own run. Every comparison is counted, and every number you see or hear comes from that run.

New Shorts every Tuesday, Thursday and Saturday. Sorting comes first; pathfinding and cellular automata are next.

The earlier race episodes, where algorithms compete on the same input, are in the playlists.

Tags

algorithms
sorting algorithms
computer science
algorithm visualization
bubble sort
quick sort
insertion sort
data structures
coding
programming
learn to code

Stats

Joined August 4, 2026
1,628 total views

Videos

Five Inputs, One Flat Line: Heap Sort Costs 1,388–1,631 on Every List While Bubble Swings 294–9,120
4:00
Five Inputs, One Flat Line: Heap Sort Costs 1,388–1,631 on Every List While Bubble Swings 294–9,120

0 views

2d ago

The Shortest Route Is Not the Cheapest: BFS Takes 103 Cells and Pays 308, A* Takes 111 and Pays 232
2:33
The Shortest Route Is Not the Cheapest: BFS Takes 103 Cells and Pays 308, A* Takes 111 and Pays 232

0 views

6d ago

Gnome Sort Was Dead Last With 6,780 — On a Nearly-Sorted List It Finishes 2nd With 131 Ops
2:44
Gnome Sort Was Dead Last With 6,780 — On a Nearly-Sorted List It Finishes 2nd With 131 Ops

1 view

9d ago

Room to Breathe: the Same 5 Life Patterns on 4× the Field — R-pentomino Hits Its Textbook 1,103
3:15
Room to Breathe: the Same 5 Life Patterns on 4× the Field — R-pentomino Hits Its Textbook 1,103

0 views

13d ago

Only Two Numbers: 6 Sorting Algorithms on a List of Just 48s and 96s — Selection Sort Finishes Last
2:45
Only Two Numbers: 6 Sorting Algorithms on a List of Just 48s and 96s — Selection Sort Finishes Last

4 views

2w ago

The Braided Maze: 4 Algorithms, 4 Different Routes — Depth-First Walks 271 Cells, A* Needs 87
2:33
The Braided Maze: 4 Algorithms, 4 Different Routes — Depth-First Walks 271 Cells, A* Needs 87

39 views

2w ago

The Worst Case: 9 Sorting Algorithms on a Reversed List — a 9,120 Three-Way Tie, and Heap Speeds Up
5:23
The Worst Case: 9 Sorting Algorithms on a Reversed List — a 9,120 Three-Way Tie, and Heap Speeds Up

3 views

3w ago

Weighted Terrain: Greedy Finds a Route 10× Faster — and Pays 43% More Toll Than the Cheapest Path
3:15
Weighted Terrain: Greedy Finds a Route 10× Faster — and Pays 43% More Toll Than the Cheapest Path

2 views

3w ago

The Big League: 256 Numbers, the 4 Fastest Algorithms — Quick Sort 2,787 Ops, Shell Sort 6,109
3:35
The Big League: 256 Numbers, the 4 Fastest Algorithms — Quick Sort 2,787 Ops, Shell Sort 6,109

1 view

1mo ago

5 Game of Life Patterns Race to Settle — Century Wins at Gen 103, R-pentomino Boils for 1,073
3:13
5 Game of Life Patterns Race to Settle — Century Wins at Gen 103, R-pentomino Boils for 1,073

2 views

1mo ago

The Labyrinth: One 423-Cell Corridor, and Depth-First Beats A* — 1,009 Ops vs 1,176
3:15
The Labyrinth: One 423-Cell Corridor, and Depth-First Beats A* — 1,009 Ops vs 1,176

36 views

1mo ago

Organ Pipe: the Input That Dethrones Quick Sort — Shell Sort Wins in 772 Ops
3:59
Organ Pipe: the Input That Dethrones Quick Sort — Shell Sort Wins in 772 Ops

50 views

1mo ago

The Open Field: A* Explores All 1,363 Cells and Ties Brute-Force BFS — Greedy Escapes in 222 Ops
3:15
The Open Field: A* Explores All 1,363 Cells and Ties Brute-Force BFS — Greedy Escapes in 222 Ops

18 views

1mo ago

Duplicate Storm: 6 Algorithms Race a List of Only 8 Unique Values — Selection Sort Never Notices
3:39
Duplicate Storm: 6 Algorithms Race a List of Only 8 Unique Values — Selection Sort Never Notices

9 views

1mo ago

Maze Race: A* vs Greedy vs BFS vs DFS — Greedy Escapes in 271 Ops, BFS Floods 1,438
3:25
Maze Race: A* vs Greedy vs BFS vs DFS — Greedy Escapes in 271 Ops, BFS Floods 1,438

6 views

1mo ago

The Mega Race: 9 Sorting Algorithms on One List — Heap Debuts on the Podium, Gnome Comes Dead Last
3:58
The Mega Race: 9 Sorting Algorithms on One List — Heap Debuts on the Podium, Gnome Comes Dead Last

8 views

1mo ago

The Nightmare Race: a Perfectly Reversed List Destroys Bubble and Insertion — 9,120 Ops Each
5:16
The Nightmare Race: a Perfectly Reversed List Destroys Bubble and Insertion — 9,120 Ops Each

6 views

1mo ago

The Rematch: 5 Sorting Algorithms Race a Nearly-Sorted List — Insertion Sort Wins in 119 Ops
3:22
The Rematch: 5 Sorting Algorithms Race a Nearly-Sorted List — Insertion Sort Wins in 119 Ops

8 views

2mo ago

6 Sorting Algorithms Race on the Same Numbers — Bubble Sort Needs 6,901 Ops, Quick Sort 882
4:02
6 Sorting Algorithms Race on the Same Numbers — Bubble Sort Needs 6,901 Ops, Quick Sort 882

13 views

2mo ago