Bun
Bun is a fast JavaScript runtime, bundler, and package manager designed for developers building server-side and full-stack applications.
About this data
Updated June 29, 2026
Overall Pulse Score
-2 over this period
A 0-100 index summarizing the tone of 102 relevant public mentions gathered from public online communities across 12 weeks in the selected period. It measures online sentiment, not a rating of the product's quality.
Weekly Sentiment Trend
Pulse Score by week over the selected period. Each point is one complete week of mentions.
This week in public discussion
Recent discussion around Bun leaned noticeably negative, with a declining pulse score reflecting a surge in bug and reliability complaints across the period. Commenters raised repeated concerns about segmentation faults on Windows, particularly in contexts involving other tools built on Bun, and several mentions flagged integration issues including CommonJS compatibility differences from Node. Some discussion praised performance and ease of use, but those positive themes were heavily outnumbered by reports of crashes and missing or broken functionality.
Read the deeper analysisAI-generated summary of public online discussion during this period. It reflects the tone of that discussion, not facts about the product or our views.
Sentiment mix by week
How the tone of public discussion splits each week.
Ringed points mark weeks with unusually high discussion volume, more than double this product's typical week.
Most-discussed praise
Most-discussed complaints
Themes across the selected period, with mention counts.
How Bun compares
Pulse Score over the selected period versus the top tracked competitors in Coding.
Where the mentions come from
Share of the 102 relevant public mentions in the selected period, by source.
Sample public mentions
Showing 5 of 102 analyzed public mentions in this period, with links to the original source. We do not reproduce full threads.
“OpenCode v1.17.10 crashes with Bun segmentation fault on Windows; v1.17.9 appears stable. ### Description Summary After upgrading OpenCode to v1.17.10, OpenCode started crashing with a native Bun segmentation fault on Windows. Downgrading to v1.17.9 appears to stop the fatal cras...”
“MCP stdio servers spawn visible CMD windows on Windows. ### Before opening, please confirm: - [x] I have searched for duplicate or closed issues Operating System Windows 11 Kiro Version kiro-cli 2.9.0 Bug Description Every MCP server configured with stdio transport spawns a visib...”
“WebView timeout waiting for actionable. ### What version of Bun is running? 1.3.12+700fc117a What platform is your computer? Darwin 25.3.0 arm64 arm What steps can reproduce the bug? Running the BunView usage example demonstrated in the release post: https://bun.sh/blog/bun-v1.3....”
“bun crashed when vibe coding. ### Description [Windows] Segmentation fault during chat session (Bun runtime crash) 🐛 Bug Description When using OpenCode v1.17.10 on Windows 11, the application crashes with a Bun segmentation fault after a few conversation turns, typically when S...”
“bun init --yes doesn't include "types": ["bun"] in tsconfig.json. ### What version of Bun is running? 1.3.11+af24e281e What platform is your computer? Darwin 25.2.0 arm64 arm What steps can reproduce the bug? Open index.ts --> Typescript error on line 1, as there's no type for co...”
1,247+ more analyzed mentions, full history, and theme breakdowns are part of Pro.
Get ProDeeper analysis
- Bug reports and reliability concerns dominated discussion and overwhelmed positive themes across the full four-week window.
- Sentiment trended downward overall compared to the prior period, with a late spike in activity pulling the score lower rather than higher.
- Windows platform behavior was the most divisive topic, drawing concentrated frustration while non-Windows commentary stayed comparatively measured.
- Performance and ease-of-use praise remained a consistent undercurrent but was frequently overshadowed by complaints in the same conversations.
| Praise theme | Mentions |
|---|---|
| Strong features | 16 |
| Easy to use | 14 |
| Performance | 13 |
| Feature requests | 4 |
| Good integrations | 3 |
| Complaint theme | Mentions |
|---|---|
| Bugs | 63 |
| Reliability | 44 |
| Lacking integrations | 11 |
| Missing features | 7 |
| Easy to use | 5 |
Public discussion about Bun over the past four weeks carried a notably negative tone, with complaints outweighing praise by a wide margin. Bug reports dominated conversation, appearing in roughly half of all tracked mentions, and reliability concerns were not far behind. The recurring image commenters painted was of a runtime that impresses in controlled settings but falters in real-world, production-adjacent use. Windows platform behavior emerged as a particularly charged topic, with multiple mentions describing segmentation faults, binary misidentification, and visible CMD windows spawning unexpectedly. The frustration in these posts carried a sense of regression, as several commenters pointed to specific prior versions behaving more stably.
On the positive side, a meaningful cluster of discussion still credited Bun with genuine speed and a relatively smooth setup experience. Performance praise and ease-of-use appreciation together formed the backbone of supportive sentiment, and a handful of mentions applauded specific features. However, even some positive themes had a conditional quality, with integration concerns and missing features tempering enthusiasm.
The score trajectory over the window tells a story of volatility rather than steady improvement. Sentiment climbed from a low point in early May through a relative peak around late May before retreating. The final weeks of the window saw a sharp uptick in total mentions alongside a dip in score, suggesting that a surge of activity skewed negative. Opinion divided most visibly around platform consistency, with commenters on non-Windows environments expressing fewer acute grievances, while Windows users contributed a disproportionate share of critical posts. There was also some division on whether integration shortcomings reflected Bun itself or the broader ecosystem adjusting to it.
AI-generated summary of public online discussion during this period. It reflects the tone of that discussion, not facts about the product or our views.
Member perspectives
Individual opinions from Pro members, posted over time. These are personal member views, not aggregated sentiment data.
Overall Pulse Score
-2 over this period
A 0-100 index summarizing the tone of 102 relevant public mentions gathered from public online communities across 12 weeks in the selected period. It measures online sentiment, not a rating of the product's quality.
Data summary
Compare with another tool
Bun
36
Trainual
88
Score-level preview from live weekly tracking.
Are you Bun?
If you represent this product, you can share context about the data shown here. We read every submission.
Share feedbackAffiliate disclosure
Some links on this site may be affiliate links. If you click one and make a purchase, we may earn a commission at no extra cost to you. Learn more.
Compare with similar tools
Bubble
No-code platform that lets users design, build, and deploy full-stack web applications without writing code.
Free tier; paid plans available
View DetailsRevenueCat
A platform that manages in-app purchases, subscriptions, and revenue analytics for iOS and Android app developers.
Free tier; paid plans available
View Details