spark
ModFinds performance and memory problems in your game or server.
Why gradeA
How grades workStrengths
Points lost
- Some modpacks removed it−2 points
All 11 criteria
Maintenance
Full points27 / 27Last releaseHow long ago the newest file came out, or an existing file was marked as working on a new Minecraft version.5 weeks ago (19 Sep 2026) 12 / 12Supports popular versionsWhether the project has a file for a Minecraft version that 15% or more of the popular mods updated in the last 6 months also support. A version many modpacks use, like 1.20.1 or 1.21.1, also counts after a release in the last 12 months.26.3 (latest) on Forge, Fabric and NeoForge, 1.19.2 on Quilt 9 / 9Regular releasesIn how many of the last 24 months a new file came out. Full points at 8 months.Releases in 13 of the last 24 months 6 / 6Stability
2 points lost20 / 22Removed from modpacksHow many modpacks removed it in a later version of the pack. We can only see this in modpacks with two or more versions. A pack that swaps it for another edition of the same project, or that is rebuilt from scratch, does not count.59 of the 389 modpacks with two or more versions removed it in a later one (15%) See the 59 modpacks8 / 10Quick fixesHow often a release needed a quick fix: a new release within 3 days to fix a problem in it.No quick fix in 2 years 7 / 7Known conflictsHow many projects say they do not work with it, compared with how widely it is used. Packs, small projects, forks, ports, add-ons, alternatives and old versions do not count.1 known conflict, but it does not count in the grade See the known conflict5 / 5Transparency
Full points10 / 10Source codeWhether the project page links to its source code, so anyone can read what it does.GitHub · lucko/spark 7 / 7Place to report problemsWhether the project page links to a place where players can report problems: an issue tracker.GitHub issues · lucko/spark 3 / 3Popularity
Full points4 / 4DownloadsDownloads on Modrinth and CurseForge. Full points from 5 million.242,035,630 4 / 4Track record
Full points8 / 8AgeHow long the project has existed. It counts less when no new file came out recently.6.7 years, 146 releases 8 / 8Security
PassedFile checksThis check adds no points. It can only take points away.Our checks found nothing harmful in all 23 latest files for recent Minecraft versions. See Security
69.3 of the 71 points that apply = 98 out of 100. The points above are rounded to whole numbers.
About
spark is a performance profiler for Minecraft clients, servers, and proxies, designed to help identify CPU bottlenecks, memory problems, and changes in overall server health. Its CPU profiler samples system activity and builds a readable call graph that can be examined in an online viewer; profiling can be customized to focus on selected threads, sampling intervals, or unusually slow ticks. For memory diagnosis, spark provides heap summaries with memory use and per-class instance counts, full JVM heap dumps for inspection in other tools, and garbage-collection monitoring to relate collection activity to hangs and memory being freed. Health reports include TPS, tick durations, CPU, memory, and disk usage, while tick monitoring can flag slow individual ticks so that profiling can focus on the periods associated with lag spikes.
Written from Modrinth . How we write it
In-game changes
Does not change the game's code directly.
Adds no new blocks, items or other content.
Keeps all of vanilla Minecraft's textures, models and sounds.
Often used with it
See all 30Details
- Creator
- lucko
- Downloads
- 242M
- Created
- 6 Feb 2020
- Official pages
- Modrinth , CurseForge
- Links
- Source code , Issues , Wiki , Discord
Security
No harmful code found
We checked its files and read their code, without running it.
What it can do on your computer
- Can download and run new code
- The same part of the code can download data and run it as code. Auto-updaters do this, and so does malware.Not a Warning: we read its code and found no code downloaded over http or run without a check.
- Accepts connections from other computers
- It can accept connections from other computers.
- Uses folders outside the game
- It can read or write files outside your Minecraft folder, on the rest of your computer. Found: the temporary files folder.
- Starts other programs
- It can start another program on your computer. It can read system or hardware information, run a command line and start a Java program.
- Creates settings files
- The mod keeps its settings in the config folder of your game, where you can change or delete them. 1 file in your config folder.
- Connects to the internet
- It has code that can go online, for example to check for updates, load skins or send crash reports. No web address is written in full in its code. See Privacy
Why we show this: a mod runs on your computer like any program, so harmful code in it can take your accounts or files. Our checks look for known signs of harm. They cannot prove that a file is harmless. In the grade: malware means no grade, and a Warning in a latest file for a recent Minecraft version lowers it.
How we checked
- FilesWe download the files from Modrinth or CurseForge and look at what is inside them and what their code can do, without running them. Fixed rules tell what is harmful.53 latest files: the newest file for each Minecraft version and loader. The answer above is about the 23 for recent versions. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks. See each file in Releases
- Their codeWe turn the code of the files back into readable code and follow what it does, without running it. This shows what it downloads, what it sends and where your login goes.Read without running it
- Author on ModrinthThe disclosure form on Modrinth, where the author declares that the project reads or edits things on your system outside the game. Since 13 Aug 2026, Modrinth's rules require it when this applies.Nothing declared about your system outside the game.
- Uses folders outside the gameUses the temporary files folder.
- Looked for, not foundWe looked for these in the file and did not find them.Updating itself, the webcam or microphone, an AI service.
Privacy
Sends unknown data
Sent to an address built while the game runs.
We found this in its code, read without running it.
Why we show this: a mod can send things about you over the internet, like your player name or your login. Contacting an address to check for updates or download files sends nothing about you. Not in the grade: sending data can be normal for what a mod does.
How we checked
- Files readWe read the code without running it. We list each web address the code contacts while you play, and what it sends. Code that is never used is left out.The code of all 23 files, for recent Minecraft versions. See each file in Releases
- Address built while the game runsThe code builds this address while the game runs: it is not written in the file.Purpose not known.Unknown data
- Author on ModrinthThe disclosure form on Modrinth, where the author declares crash reports, usage data and advertisements. Since 13 Aug 2026, Modrinth's rules require it when a project collects data on its users or shows advertisements.Nothing declared about crash reports, usage data or advertisements.
AI
No sign that AI was used to make it
We looked for AI tools in its texts, files, images, code history and pull requests and found none.
No sign of AI in the game
We found no AI service, AI library or AI model file in its code.
Why we show this: some players and servers avoid projects made with AI, and AI in the game can send what you write to an online service. Not in the grade: using AI does not tell whether a project works well or is kept up to date.
How we checked
- Author on ModrinthThe disclosure form on Modrinth. Since 13 Aug 2026, Modrinth's rules require it when a substantial part of the code is AI output, when an asset is mainly AI output, or when the project or its page relies on generative AI.No AI content or AI features declared.
- Code historyThe public code on GitHub: who made each change, credit lines such as "Co-authored-by", and its files.Nothing found565 commits read
- Pull requestsThe recent pull requests, comments, topics and README of the GitHub repository.Nothing found50 pull requests read
- Description and changelogsThe description, project page and newest changelogs: sentences saying an AI tool was used, and text pasted from an AI chat.Nothing found40 changelogs read
- Its filesFiles that AI coding tools leave behind (like AGENTS.md), and the texts inside the files you download.Nothing found
- Images in its filesHidden data in the images of the files you download, where AI image tools write their name and settings.Nothing found
- Icon and galleryThe metadata of the original icon and gallery images of the project.Nothing found2 images read
- Code of the modThe code and files of the mod, read without running it: addresses of AI services, AI libraries, AI model files and a place for your own AI key.No AI service, AI library or AI model file1,632 code files read
Compatibility
See all 146 filesPoint at or tap a version to see its loaders.
Known conflicts
These projects do not work together with spark: their authors or spark's author say so. If you install both, the game can crash or some features can stop working. Some of them do the same job as spark, so you only need one.
Related projects
Projects that need spark to work.
Modpacks using this project
Find modpacks with it| Oct 2024 | 1,205 |
|---|---|
| Nov 2024 | 1,138 |
| Dec 2024 | 1,205 |
| Jan 2025 | 1,329 |
| Feb 2025 | 1,264 |
| Mar 2025 | 1,310 |
| Apr 2025 | 1,449 |
| May 2025 | 1,419 |
| Jun 2025 | 1,390 |
| Jul 2025 | 1,373 |
| Aug 2025 | 1,394 |
| Sep 2025 | 1,284 |
| Oct 2025 | 1,417 |
| Nov 2025 | 1,521 |
| Dec 2025 | 1,648 |
| Jan 2026 | 1,656 |
| Feb 2026 | 1,616 |
| Mar 2026 | 1,614 |
| Apr 2026 | 1,723 |
| May 2026 | 1,860 |
| Jun 2026 | 1,909 |
| Jul 2026 | 2,018 |
| Aug 2026 | 1,942 |
| Sep 2026 | 1,812 |
29,290 modpacks include spark in at least one of their versions. Here are the 30 most downloaded.
RLCraft30.4M downloadslast version with it 27 Jun 2023
All the Mods 10 - ATM1022.5M downloadslast version with it 15 Oct 2026
Better MC [FORGE] - BMC421.1M downloadslast version with it 9 Oct 2026
Prominence™ II: Hasturian Era15.4M downloadslast version with it 23 Oct 2026
All the Mods 9 - ATM913.7M downloadslast version with it 12 Oct 2025
DawnCraft - Echoes of Legends10.5M downloadslast version with it 20 Nov 2025
DeceasedCraft - Urban Zombie Apocalypse9.8M downloadslast version with it 17 Jul 2026
All the Mods 8 - ATM89.3M downloadslast version with it 17 Dec 2023
Cave Horror Project 18.2M downloadslast version with it 28 Aug 2024
Better MC [FABRIC] BMC17.9M downloadslast version with it 31 May 2023Often in the same modpacks
Mods that modpacks often add together with spark. Share: how many of the modpacks with spark also have that mod.
AttributeFixAModin 43% of the modpacks with spark
Chat HeadsAModin 37% of the modpacks with spark
ChippedCModin 36% of the modpacks with spark
Server Performance - Smooth Chunk SaveAModin 36% of the modpacks with spark
ConnectivityAModin 35% of the modpacks with spark
AI Improvements: Performance TuningAModin 35% of the modpacks with spark
NetherPortalFixAModin 34% of the modpacks with spark
AmendmentsAModin 33% of the modpacks with spark
Sodium Dynamic LightsCModin 32% of the modpacks with spark
Macaw's TrapdoorsAModin 32% of the modpacks with sparkLatest files
The newest file for each Minecraft version and loader. The files for recent versions come first. Recent versions: those released in the last 2 years, plus 1.20.1 and 1.21.1, among the most played in modpacks.