Comments (6)
@russel Examples of weight
usage and of weight_max
usage can be found in the benchmarks and also in the demos[1, 2].
from rayon.
Rayon knows how to split the collection, but it's still an open question to decide when to split. See #81 and this discussion on the users forum.
Try adding a weight
call to tune this, or force the finest granularity with weight_max
.
from rayon.
@cuviper Hummm… I was assuming Java/Stream/ForkJoin type thing. Do you have an example of idiomatic use rather than the reference to the API documentation?
from rayon.
@lilianmoraru Thanks for those pointers. Those codes have shown me some things about other crates as well as about Rayon. :-)
from rayon.
.weight_max()
does the job as needed.
To avoid violations of the Principal of Least Surprise I wonder if this "maximal parallelism" is a better default that the "keep it sequential" currently in place> After all the name of the function is par_iter
.
from rayon.
FWIW, the current default is not "keep it sequential." Rather, the current default weight is 1.0, and the internal threshold for splitting is 10240.0. So if your total collection is smaller than that, then yes it will run fully sequentially. That threshold is rather arbitrary, which is why we're talking about ways to improve the default experience. I don't think "maximal parallelism" will be the right answer either, but if you want to join the conversation, please visit the links I gave earlier.
from rayon.
Related Issues (20)
- Potential to fix memory ordering for value HOT 2
- a broadcast that only gets executed on idle threads
- `in_place_scope` documentation is confusing/unclear HOT 14
- use_current_thread and the global thread pool HOT 2
- Why does ThreadPool block until a operation is finished? HOT 1
- A way to hook before/after job execution (and/or a way to see a number of tasks in the processing queue)
- Function dependencies with Rayon without blocking the thread / Rayon synchronization primitives?
- Add synchronization guarantees for `ParallelIterator::for_each*` HOT 1
- Par bridge with optional buffering IO handling HOT 2
- Thread pool without work stealing HOT 6
- Question about return types from .map() HOT 4
- Terribly inefficient design and possible solution HOT 5
- [Discussion] Is it possible to impl `IntoIterator` for `ParallelIterator`? HOT 3
- Yield locks HOT 1
- the method `par_iter` exists for struct `ChunkByMut<'_, BinF32, {[email protected]:207:78}>`, but its trait bounds were not satisfied HOT 5
- Unupdated crossbeam dependency makes MIRI angry HOT 1
- help: How to implement memoized chunks for parallel iterator? HOT 2
- wrong repo, issue deleted HOT 3
- Comparison with Spice HOT 1
- Switching par_iter makes memory usage explode (40x) HOT 3
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from rayon.