Hacktoberfest 2026: the issues maintainers tagged for October, open and beginner-friendly. Browse Hacktoberfest issues

Engine performance

Open
#1,073 2 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty
5/5
Estimated time
Over a week
Newbie friendliness
25/100
Issue type
Feature
Clarity
Needs clarification
Activity status
Stale
Tech stack
java
Domain
backend, performance

Research direction

Start by reading Jinjava#renderForResult and the JinjavaInterpreter#render->parse methods named in the issue. Trace why parsing occurs for each render and determine whether a TemplateId->Node cache is feasible; done means documenting the obstacles and defining the implementation scope.

Written by the indexing model from the issue text.

Description

Given a com.hubspot.jinjava.Jinjava#renderForResult method it seems that every time a template is rendered the String template is parsed using JinjavaInterpreter#render->parse methods each time.

Could you clarify why the rendering routine doesn't use some sort of a TemplateId->Node cache to reuse the parsed AST in the rendering step? Are there any obstacles to implement that?

Dominant language
Java
Stars
785
Forks
184
Avg merge
6d 22h
Merged PRs (30d)
1

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

More from HubSpot/jinjava

All issues in HubSpot/jinjava

Similar issues

More Java issues

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.