feat(cloudflare,deno,vercel-edge): Add span streaming support by Lms24 · Pull Request #20127 · getsentry/sentry-javascript

Lms24 · 2026-04-08T15:42:19Z

This PR adds span streaming support to cloudflare, deno and vercel edge SDKs. Similarly to Node, we check for the traceLifecycle option and add spanStreamingIntegration based on the option.

Also added unit, integration and e2e tests to ensure that the SDKs actually send spans. Similarly to Node and Browser, we'll likely still miss data from event processors but we can follow up with this later.

h/t @JPeer264 for the e2e test helpers! I cherry-picked them from #17852 and adjusted them for naming.

ref JS-1010

github-actions · 2026-04-08T15:47:18Z

Semver Impact of This PR

🟡 Minor (new features)

📋 Changelog Preview

This is how your changes will appear in the changelog.
Entries from this PR are highlighted with a left border (blockquote style).

New Features ✨

Core

Add enableTruncation option to Google GenAI integration by andreiborza in #20184
Add enableTruncation option to Anthropic AI integration by andreiborza in #20181
Add enableTruncation option to LangGraph integration by andreiborza in #20183
Add enableTruncation option to LangChain integration by andreiborza in #20182
Add enableTruncation option to OpenAI integration by andreiborza in #20167
Export a reusable function to add tracing headers by JPeer264 in #20076

Deps

Bump axios from 1.13.5 to 1.15.0 by dependabot in #20180
Bump hono from 4.12.7 to 4.12.12 by dependabot in #20118
Bump defu from 6.1.4 to 6.1.6 by dependabot in #20104

Other

(cloudflare) Propagate traceparent to RPC calls - via fetch by JPeer264 in #19991

(cloudflare,deno,vercel-edge) Add span streaming support by Lms24 in #20127

Bug Fixes 🐛

(ci) Prevent command injection in ci-metadata workflow by fix-it-felix-sentry in #19899
(deno) Avoid inferring invalid span op from Deno tracer by Lms24 in #20128
(e2e) Add op check to waitForTransaction in React Router e2e tests by copilot-swe-agent in #20193

Internal Changes 🔧

Deps

Bump hono from 4.12.7 to 4.12.12 in /dev-packages/e2e-tests/test-applications/cloudflare-hono by dependabot in #20119
Bump axios from 1.13.5 to 1.15.0 in /dev-packages/e2e-tests/test-applications/nestjs-basic by dependabot in #20179

Other

(bugbot) Add rules to flag test-flake-provoking patterns by Lms24 in #20192
(deps-dev) Bump vite from 7.2.0 to 7.3.2 in /dev-packages/e2e-tests/test-applications/tanstackstart-react by dependabot in #20107
(react) Remove duplicated test mock by s1gr1d in #20200
(size-limit) Bump failing size limit scenario by Lms24 in #20186

_{🤖 This preview updates automatically when you update the PR.}

github-actions · 2026-04-08T15:56:15Z

size-limit report 📦

⚠️ Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

Path	Size	% Change	Change
@sentry/browser	25.72 kB	-	-
@sentry/browser - with treeshaking flags	24.21 kB	-	-
@sentry/browser (incl. Tracing)	42.73 kB	-	-
@sentry/browser (incl. Tracing, Profiling)	47.35 kB	-	-
@sentry/browser (incl. Tracing, Replay)	81.54 kB	-	-
@sentry/browser (incl. Tracing, Replay) - with treeshaking flags	71.11 kB	-	-
@sentry/browser (incl. Tracing, Replay with Canvas)	86.25 kB	-	-
@sentry/browser (incl. Tracing, Replay, Feedback)	98.45 kB	-	-
@sentry/browser (incl. Feedback)	42.51 kB	-	-
@sentry/browser (incl. sendFeedback)	30.39 kB	-	-
@sentry/browser (incl. FeedbackAsync)	35.38 kB	-	-
@sentry/browser (incl. Metrics)	27.04 kB	-	-
@sentry/browser (incl. Logs)	27.18 kB	-	-
@sentry/browser (incl. Metrics & Logs)	27.86 kB	-	-
@sentry/react	27.48 kB	-	-
@sentry/react (incl. Tracing)	45.05 kB	-	-
@sentry/vue	30.56 kB	-	-
@sentry/vue (incl. Tracing)	44.59 kB	-	-
@sentry/svelte	25.74 kB	-	-
CDN Bundle	28.41 kB	-	-
CDN Bundle (incl. Tracing)	43.75 kB	-	-
CDN Bundle (incl. Logs, Metrics)	29.78 kB	-	-
CDN Bundle (incl. Tracing, Logs, Metrics)	44.83 kB	-	-
CDN Bundle (incl. Replay, Logs, Metrics)	68.59 kB	-	-
CDN Bundle (incl. Tracing, Replay)	80.64 kB	-	-
CDN Bundle (incl. Tracing, Replay, Logs, Metrics)	81.66 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback)	86.17 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics)	87.2 kB	-	-
CDN Bundle - uncompressed	82.99 kB	-	-
CDN Bundle (incl. Tracing) - uncompressed	129.77 kB	-	-
CDN Bundle (incl. Logs, Metrics) - uncompressed	87.14 kB	-	-
CDN Bundle (incl. Tracing, Logs, Metrics) - uncompressed	133.19 kB	-	-
CDN Bundle (incl. Replay, Logs, Metrics) - uncompressed	210.12 kB	-	-
CDN Bundle (incl. Tracing, Replay) - uncompressed	246.65 kB	-	-
CDN Bundle (incl. Tracing, Replay, Logs, Metrics) - uncompressed	250.05 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback) - uncompressed	259.56 kB	-	-
CDN Bundle (incl. Tracing, Replay, Feedback, Logs, Metrics) - uncompressed	262.95 kB	-	-
@sentry/nextjs (client)	47.47 kB	-	-
@sentry/sveltekit (client)	43.2 kB	-	-
@sentry/node-core	57.86 kB	+0.02%	+7 B 🔺
@sentry/node	174.86 kB	+0.03%	+41 B 🔺
@sentry/node - without tracing	97.97 kB	+0.03%	+22 B 🔺
@sentry/aws-serverless	115.22 kB	+0.02%	+19 B 🔺

View base workflow run

…ng (#18986) How it should be used is in the JSDoc. It worked quite well for my Cloudflare tests Closes #18987 (added automatically)

github-actions · 2026-04-10T12:54:49Z

node-overhead report 🧳

Note: This is a synthetic benchmark with a minimal express app and does not necessarily reflect the real-world performance impact in an application.
⚠️ Warning: Base artifact is not the latest one, because the latest workflow run is not done yet. This may lead to incorrect results. Try to re-run all tests to get up to date results.

Scenario	Requests/s	% of Baseline	Prev. Requests/s	Change %
GET Baseline	8,806	-	9,190	-4%
GET With Sentry	1,764	20%	1,711	+3%
GET With Sentry (error only)	6,213	71%	6,115	+2%
POST Baseline	1,196	-	1,202	-0%
POST With Sentry	591	49%	584	+1%
POST With Sentry (error only)	1,057	88%	1,032	+2%
MYSQL Baseline	3,158	-	3,247	-3%
MYSQL With Sentry	437	14%	431	+1%
MYSQL With Sentry (error only)	2,603	82%	2,603	-

View base workflow run

dev-packages/test-utils/src/event-proxy-server.ts

linear-code · 2026-04-10T14:36:36Z

JS-1010 Span Streaming Implementation

packages/deno/src/index.ts

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packages/cloudflare/test/sdk.test.ts

Lms24 mentioned this pull request Apr 8, 2026

fix(deno): Avoid inferring invalid span op from Deno tracer #20128

Merged

Base automatically changed from lms/feat-span-streaming-exports to lms/feat-span-first April 9, 2026 10:54

Base automatically changed from lms/feat-span-first to develop April 9, 2026 12:46

Lms24 force-pushed the lms/feat-span-streaming-deno-cf-ve branch from bd9726c to 777478b Compare April 9, 2026 13:00

Lms24 and others added 6 commits April 10, 2026 14:13

feat(cloudflare,deno,vercel-edge): Add span streaming support

07971b3

feat(test-utils): Add a way to wait for single spans for Span streami…

79505f2

…ng (#18986) How it should be used is in the JSDoc. It worked quite well for my Cloudflare tests Closes #18987 (added automatically)

adjust e2e test helpers to reflect current naming scheme

1c57daf

add deno e2e test app

a0b77af

bit of cleanup

40dddeb

.

3fde21f

Lms24 force-pushed the lms/feat-span-streaming-deno-cf-ve branch from 777478b to 3fde21f Compare April 10, 2026 12:13

Lms24 added 2 commits April 10, 2026 14:19

remove unnecessary test

c879175

fix deno-streamed e2e test in ci

195a7b9

add vercel and deno unit tests

1d987cb

Lms24 marked this pull request as ready for review April 10, 2026 14:18

cursor bot reviewed Apr 10, 2026

View reviewed changes

dev-packages/test-utils/src/event-proxy-server.ts Show resolved Hide resolved

fix too early return in waitForStreamedSpan

f2149eb

Lms24 requested review from a team, JPeer264 and nicohrubec and removed request for a team April 10, 2026 14:33

Lms24 self-assigned this Apr 10, 2026

cursor bot reviewed Apr 10, 2026

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packages/deno/src/index.ts Show resolved Hide resolved

Lms24 added 3 commits April 10, 2026 16:52

add missing export

5ede4d1

fix wrong export, add test

e7d16f9

import fix

2b9e077

cursor bot reviewed Apr 10, 2026

View reviewed changes

packages/cloudflare/test/sdk.test.ts Show resolved Hide resolved

fix test ... for real this time

a65a7fa

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feat(cloudflare,deno,vercel-edge): Add span streaming support#20127
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