perf(core): Read the clock once per performance collection round

[runningcode]

📜 Description

While a transaction is running, DefaultCompositePerformanceCollector collects performance data every 100ms for up to 30 seconds.

CompositeData.addDataAndCheckTimeout read the clock to check the 30s collection timeout once per in-flight transaction, allocating a SentryNanotimeDate (plus System.currentTimeMillis() + System.nanoTime()) each time — even though the enclosing timer task had just read the same clock for the sample it was distributing.

That reading is now passed in, so a collection round reads the clock once rather than once per transaction.

💡 Motivation and Context

Perf improvement!

💚 How did you test it?

Unit tests

📝 Checklist

• I added GH Issue ID & Linear ID
• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

[sentry]

📲 Install Builds

Android

🔗 App Name	App ID	Version	Configuration
SDK Size	io.sentry.tests.size	8.52.0 (1)	release

⚙️ sentry-android Build Distribution Settings

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	319.10 ms	366.38 ms	47.28 ms
Size	0 B	0 B	0 B

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
6b019b7	343.31 ms	417.23 ms	73.91 ms
d15471f	286.65 ms	314.68 ms	28.03 ms
d217708	409.83 ms	474.72 ms	64.89 ms
d500866	326.13 ms	378.70 ms	52.58 ms
fcec2f2	314.96 ms	373.66 ms	58.70 ms
d501a7e	314.55 ms	343.34 ms	28.79 ms
7414e9b	322.49 ms	378.88 ms	56.39 ms
fcec2f2	357.47 ms	447.32 ms	89.85 ms
a416a65	316.52 ms	359.67 ms	43.15 ms
983e0f0	350.64 ms	386.44 ms	35.79 ms

App size

Revision	Plain	With Sentry	Diff
6b019b7	0 B	0 B	0 B
d15471f	1.58 MiB	2.13 MiB	559.54 KiB
d217708	1.58 MiB	2.10 MiB	532.97 KiB
d500866	0 B	0 B	0 B
fcec2f2	1.58 MiB	2.12 MiB	551.50 KiB
d501a7e	0 B	0 B	0 B
7414e9b	0 B	0 B	0 B
fcec2f2	1.58 MiB	2.12 MiB	551.50 KiB
a416a65	1.58 MiB	2.12 MiB	555.26 KiB
983e0f0	0 B	0 B	0 B