ref: Use SentrySpan protocol instead of class

[noahsmartin]

The SentrySpan protocol is already part of the public interface and can therefore be used from Swift. The SentrySpan class is still internal to objc. To make this Swift migration easier I changed it to use the protocol, which seems to compile fine

#skip-changelog

Closes #6299

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Note

Switch SentryTimeToDisplayTracker to the SentrySpan protocol (id<SentrySpan>) for span properties and method parameters.

• Core (time-to-display tracking)
  • Update SentryTimeToDisplayTracker to use id<SentrySpan> instead of SentrySpan for initialDisplaySpan and fullDisplaySpan in Sources/Sentry/SentryTimeToDisplayTracker.m and Sources/Sentry/include/SentryTimeToDisplayTracker.h.
  • Change method signature addTimeToDisplayMeasurement: to accept id<SentrySpan>.
  • Header: replace @class SentrySpan; with @protocol SentrySpan; and adjust property declarations accordingly.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 86.793%. Comparing base (119ab1c) to head (485088e).
⚠️ Report is 6 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #6298       +/-   ##
=============================================
+ Coverage   86.651%   86.793%   +0.141%     
=============================================
  Files          437       438        +1     
  Lines        37189     37323      +134     
  Branches     17345     17435       +90     
=============================================
+ Hits         32225     32394      +169     
+ Misses        4918      4883       -35     
  Partials        46        46               

Files with missing lines	Coverage Δ
Sources/Sentry/SentryTimeToDisplayTracker.m	100.000% <ø> (ø)

... and 27 files with indirect coverage changes

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1223.02 ms	1241.33 ms	18.31 ms
Size	23.75 KiB	994.71 KiB	970.97 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
6502818	1229.08 ms	1245.46 ms	16.37 ms
ed85746	1231.79 ms	1248.55 ms	16.75 ms
daeb716	1215.41 ms	1246.52 ms	31.11 ms
331dad6	1210.40 ms	1242.06 ms	31.67 ms
cda95fc	1231.42 ms	1247.18 ms	15.77 ms
2b02431	1229.63 ms	1248.98 ms	19.35 ms
bc0a04c	1226.83 ms	1255.04 ms	28.21 ms
aa0b738	1236.78 ms	1253.08 ms	16.31 ms
e8da57d	1203.77 ms	1234.85 ms	31.08 ms
3b373bb	1218.19 ms	1250.57 ms	32.38 ms

App size

Revision	Plain	With Sentry	Diff
6502818	23.75 KiB	959.45 KiB	935.70 KiB
ed85746	23.75 KiB	920.83 KiB	897.08 KiB
daeb716	23.75 KiB	928.16 KiB	904.41 KiB
331dad6	23.75 KiB	928.12 KiB	904.37 KiB
cda95fc	23.75 KiB	912.77 KiB	889.02 KiB
2b02431	23.75 KiB	850.73 KiB	826.98 KiB
bc0a04c	23.75 KiB	933.32 KiB	909.57 KiB
aa0b738	23.74 KiB	872.75 KiB	849.00 KiB
e8da57d	23.75 KiB	919.69 KiB	895.94 KiB
3b373bb	23.75 KiB	947.72 KiB	923.97 KiB

Previous results on branch: useSpanProtocol

Startup times

Revision	Plain	With Sentry	Diff
85831ce	1227.78 ms	1261.64 ms	33.86 ms

App size

Revision	Plain	With Sentry	Diff
85831ce	23.75 KiB	993.69 KiB	969.94 KiB

[philipphofmann]

Thanks