waylonflinn/weblas

Optimize Reshape

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#24 opened on Feb 16, 2016

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 (1 comment) (0 reactions) (0 assignees)JavaScript (701 stars) (56 forks)batch import
help wantedperformance

Description

The GLSL shader for Tensor.reshape is very complex. It also currently accounts for ~15% of the execution time of the NN demo.

Contributor guide

Tech stack
javascript
Domain
performance
Issue type
performance
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
4
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
stale
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
WebGL shader programmingUnderstanding of tensor operations
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
20
Research direction
Examine the GLSL shader for Tensor.reshape in the weblas repository. Identify the current algorithm and complexity. Consider known optimizations for reshape operations on GPUs, such as using texture coordinates or avoiding branching. Profile the shader to confirm the bottleneck. Look for any existing discussions or linked PRs that may have addressed this. Propose a simpler shader implementation and test for correctness and performance improvement.