What’s on the Concurrency & Parallelism poster
The rule, 3 worked examples, and the mistake everyone makes.
- Concurrency is dealing with many things at once. Parallelism is doing many things at…
- Concurrent ≠ parallel · parallel implies concurrent
- One core, ten tasks interleaved = Concurrent, not parallel
- Four cores, four computations = Parallel
- Waiting on a network call = Concurrency helps; parallelism does not
- Common mistake: Adding threads to speed up I/O-bound work → Use async, or a small pool
Ask what the bottleneck is. CPU-bound work wants parallelism; I/O-bound work wants concurrency.
Questions about the Concurrency & Parallelism poster
- What’s on the Concurrency & Parallelism poster?
- The rule, 3 worked examples, and the mistake everyone makes. Concurrency is dealing with many things at once. Parallelism is doing many things at…; Concurrent ≠ parallel · parallel implies concurrent; One core, ten tasks interleaved = Concurrent, not parallel; Four cores, four computations = Parallel; Waiting on a network call = Concurrency helps; parallelism does not; Common mistake: Adding threads to speed up I/O-bound work → Use async, or a small pool. Ask what the bottleneck is. CPU-bound work wants parallelism; I/O-bound work wants concurrency.
- Who is the Concurrency & Parallelism poster for?
- Concurrency & Parallelism belongs to the Computing section rather than to a school year, because computing is not something one grade owns. Anyone learning systems can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Concurrency & Parallelism poster?
- Concurrency is about structure. Parallelism is about execution. A wall chart earns its place by being glanceable from where the work is happening, so Concurrency & Parallelism belongs on the wall where that computing work actually happens, within glancing distance, rather than filed away.
- What other posters go with Concurrency & Parallelism?
- Caching, DNS and Garbage Collection sit alongside Concurrency & Parallelism in the Computing section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.CachingDNSGarbage Collection
- Is the Concurrency & Parallelism poster free to download and print?
- Yes. Concurrency & Parallelism downloads as a free PDF with no account, no email and no watermark, like everything else in the Computing section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Concurrency & Parallelism poster print at?
- Concurrency & Parallelism is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Concurrency & Parallelism loses nothing.Printing guide
Related posters
Charts that sit alongside Concurrency & Parallelism on the same wall.
Browse every Computing poster, or start from the full catalogue.