Given a list of posts, compute the top 5 related posts for each post based on the number of shared tags.
- Read the posts JSON file.
- Iterate over the posts and populate a map containing:
tag -> List<int>, with the int representing the post index of each post with that tag.
- Iterate over the posts and for each post:
- Create a map:
PostIndex -> int to track the number of shared tags
- For each tag, Iterate over the posts that have that tag
- For each post, increment the shared tag count in the map.
- Sort the related posts by the number of shared tags.
- Write the top 5 related posts for each post to a new JSON file.
./run.sh go | rust | python | all
# windows (powershell)
./run.ps1 go | rust | python | all
or
pwsh ./run.ps1 go | rust | python | all
Rules
- FFI (including assembly inlining)
- Unsafe code blocks
- Custom benchmarking
- Disabling runtime checks (bounds etc)
- Specific hardware targeting
- Parse json at runtime
- Not hardcode number of posts
- Support up to 100 tags
- Use a stable release of the compiler/runtime
Updated Results from github workflow (raw data)
VM Specs
NB: The benchmark runs on the free tier of github workflow.
- CPU: 2 vCPUs
- RAM: 7GB
- OS: Ubuntu 22.04
Source
| Language |
Processing Time |
Total (PT + I/O) |
| Go |
26.39 ms |
58.1 ms |
| Zig |
38.00 ms |
79.5 ms |
| Rust |
38.91 ms |
56.7 ms |
| Java (GraalVM) |
40.00 ms |
70.4 ms |
| Julia |
42.67 ms |
2.717 s |
| F# |
45.86 ms |
304.2 ms |
| Odin |
46.52 ms |
294.3 ms |
| Nim |
56.00 ms |
85.6 ms |
| Vlang |
59.34 ms |
400.6 ms |
| Swift |
65.42 ms |
442.3 ms |
| Crystal |
68.53 ms |
126.0 ms |
| C# |
73.48 ms |
283.7 ms |
| Dart VM |
103.75 ms |
573.1 ms |
| LuaJIT |
118.00 ms |
400.1 ms |
| Dart AOT |
141.38 ms |
283.8 ms |
| JS (Deno) |
183.20 ms |
272.4 ms |
| JS (Node) |
202.20 ms |
278.4 ms |
| Java (JIT) |
256.69 ms |
548.1 ms |
| Numpy |
0.41 s |
640.1 ms |
| JS (Bun) |
764.40 ms |
838.6 ms |
| Lua |
2362.72 ms |
3.037 s |
| Python |
2.83 s |
2.904 s |
| Language |
Processing Time |
Total (PT + I/O) |
| Go Concurrent |
18.89 ms |
49.6 ms |
| Rust Concurrent |
23.64 ms |
41.8 ms |
| Swift Concurrent |
40.02 ms |
421.3 ms |
| F# Concurrent |
40.57 ms |
854.3 ms |
Old Results with details (on my machine)
| Language |
Processing Time |
Total (+ I/O) |
Details |
| Rust |
- |
4.5s |
Initial |
| Rust v2 |
- |
2.60s |
Replace std HashMap with fxHashMap by phazer99 |
| Rust v3 |
- |
1.28s |
Preallocate and reuse map and unstable sort by vdrmn and Darksonn |
| Rust v4 |
- |
0.13s |
Use Post index as key instead of Pointer and Binary Heap by RB5009 |
| Rust v5 |
38ms |
52ms |
Rm hashing from loop and use vec[count] instead of map[index]count by RB5009 |
| Rust v6 |
23ms |
36ms |
Optimized Binary Heap Ops by scottlamb |
| Rust Rayon |
9ms |
22ms |
Parallelize by masmullin2000 |
| Rust Rayon |
8ms |
22ms |
Remove comparison out of hot loop |
| ⠀ |
⠀ |
⠀ |
⠀ |
| Go |
- |
1.5s |
Initial |
| Go v2 |
- |
80ms |
Add rust optimizations |
| Go v3 |
56ms |
70ms |
Use goccy/go-json |
| Go v3 |
34ms |
55ms |
Use generic binaryheap by DrBlury |
| Go v4 |
26ms |
50ms |
Replace binary heap with custom priority queue |
| Go v5 |
20ms |
43ms |
Remove comparison out of hot loop |
| Go Con |
10ms |
33ms |
Go concurrency by tirprox and DrBlury |
| Go Con v2 |
5ms |
29ms |
Use arena, use waitgroup, rm binheap by DrBlury |
| ⠀ |
⠀ |
⠀ |
⠀ |
| Python |
- |
7.81s |
Initial |
| Python v2 |
1.35s |
1.53s |
Add rust optimizations by dave-andersen |
| Numpy |
0.57s |
0.85s |
Numpy implementation by Copper280z |
| ⠀ |
⠀ |
⠀ |
⠀ |
| Crystal |
50ms |
96ms |
Inital w/ previous optimizations |
| Crystal v2 |
33ms |
72ms |
Replace binary heap with custom priority queue |
| ⠀ |
⠀ |
⠀ |
⠀ |
| Odin |
110ms |
397ms |
Ported from golang code |
| Odin v2 |
104ms |
404ms |
Remove comparison out of hot loop |
| ⠀ |
⠀ |
⠀ |
⠀ |
| Dart VM |
125ms |
530ms |
Ported frog golang code |
| Dart bin |
274ms |
360ms |
Compiled executable |
| ⠀ |
⠀ |
⠀ |
⠀ |
| Vlang |
339ms |
560ms |
Ported from golang code |
| ⠀ |
⠀ |
⠀ |
⠀ |
| Zig |
80ms |
110ms |
Provided by akhildevelops |
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