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Bun

Bun is a fast JavaScript runtime, bundler, and package manager designed for developers building server-side and full-stack applications.

Primary category: Coding
About this data
This page reflects public online discussion, collected and scored by automated systems and summarized using AI. It is not a statement of fact, not an audit, and not our own opinion of the product. Automated analysis can be incomplete or wrong, and scores carry the limitations described in our methodology. Companies can respond with their own perspective. See how this is calculated.

Updated June 29, 2026

Overall Pulse Score

36
Pulse Score

+4 over this period

A 0-100 index summarizing the tone of 364 relevant public mentions gathered from public online communities across 23 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.

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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 analysis

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.

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

Strong features52
Easy to use40
Performance39
Feels fast16
Good integrations16

Most-discussed complaints

Bugs242
Reliability184
Lacking integrations33
Performance29
Missing features18

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 364 relevant public mentions in the selected period, by source.

GitHub100% (363)
Hacker News0% (1)

Sample public mentions

Showing 5 of 364 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...

GitHubJun 25, 2026

[BUG] Claude Code v2.1.9 Complete Freeze - 100% CPU, Main Thread Stuck in Infinite Loop (macOS ARM64). ## Summary Claude Code v2.1.9 session became completely unresponsive, consuming **100% CPU** and **~7GB RAM** for nearly **2 hours**. The main thread is stuck in an infinite loo...

GitHubJan 16, 2026

[BUG] Bun v1.3.10 crashes with "panic: incorrect alignment" on Windows 11 ARM64 (v2.1.47). This issue will be fixed in the next version of Claude Code. Via https://github.com/oven-sh/bun/pull/27290 Original issue: ------ Preflight Checklist - [x] I have searched existing issues a...

GitHubFeb 18, 2026

Windows Support: Multiple compatibility issues prevent usage on Windows. ## Summary QMD does not work on Windows due to multiple Unix-specific assumptions throughout the codebase. I attempted to install and run QMD on Windows 11 with Bun 1.3.6 and encountered multiple blocking is...

GitHubJan 15, 2026

[Turbopack] Excessive Fast Refresh rebuilds when dev server runs on Bun runtime. ### Link to the code that reproduces this issue https://github.com/MrScotch679/NextBunFastRefresh To Reproduce **Environment** - Next: 16.1.1 - Bun: 1.3.8 - OS: Windows - Dev command: bun --bun next ...

GitHubFeb 5, 2026

1,247+ more analyzed mentions, full history, and theme breakdowns are part of Pro.

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Deeper 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 themeMentions
Strong features52
Easy to use40
Performance39
Feels fast16
Good integrations16
Complaint themeMentions
Bugs242
Reliability184
Lacking integrations33
Performance29
Missing features18

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.

Data summary

Total mentions analyzed (all time)
1,252
Mentions in selected period
364
Weeks in range
23
vs Coding average (46)
Below by 10
Pricing
Free
Sources
GitHub (363), Hacker News (1)

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Bun

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Trainual

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Full comparison

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