perf: Don't attach headers for SentryNoOpSpan

[kevinrenskers]

📜 Description

Don't attach headers for SentryNoOpSpan. A small performance gain, but no other functional impact.

#skip-changelog

💡 Motivation and Context

Closes #2401.

💚 How did you test it?

Before I add tests, I'd like to know if this is indeed the correct way to go about this.

📝 Checklist

• I reviewed the submitted code
• I added tests to verify the changes
• I updated the docs if needed
• Review from the native team if needed
• No breaking changes

🔮 Next steps

[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1237.51 ms	1253.90 ms	16.39 ms
Size	20.75 KiB	404.82 KiB	384.07 KiB

Baseline results on branch: 8.0.0

Startup times

Revision	Plain	With Sentry	Diff
c6fb5a9	1194.80 ms	1232.68 ms	37.88 ms
010583c	1198.23 ms	1225.52 ms	27.29 ms
a9e77dc	1231.94 ms	1254.85 ms	22.91 ms
f91714d	1222.06 ms	1247.00 ms	24.94 ms
d446105	1237.06 ms	1261.34 ms	24.28 ms
2ae7db9	1231.37 ms	1239.98 ms	8.61 ms
ffa889e	1229.37 ms	1253.38 ms	24.01 ms
8361c4c	1204.07 ms	1252.74 ms	48.67 ms
4dc66f6	1202.59 ms	1228.34 ms	25.75 ms
9be1db2	1219.42 ms	1245.66 ms	26.24 ms

App size

Revision	Plain	With Sentry	Diff
c6fb5a9	20.75 KiB	383.76 KiB	363.01 KiB
010583c	20.75 KiB	383.61 KiB	362.85 KiB
a9e77dc	20.75 KiB	379.12 KiB	358.36 KiB
f91714d	20.75 KiB	381.87 KiB	361.12 KiB
d446105	20.75 KiB	383.37 KiB	362.62 KiB
2ae7db9	20.75 KiB	381.87 KiB	361.12 KiB
ffa889e	20.75 KiB	383.83 KiB	363.08 KiB
8361c4c	20.75 KiB	383.87 KiB	363.12 KiB
4dc66f6	20.75 KiB	381.81 KiB	361.06 KiB
9be1db2	20.75 KiB	373.94 KiB	353.19 KiB

Previous results on branch: fix/2401-no-headers-NoOpSpan

Startup times

Revision	Plain	With Sentry	Diff
9d980f4	1215.96 ms	1241.36 ms	25.40 ms
bd20fde	1226.45 ms	1254.98 ms	28.53 ms

App size

Revision	Plain	With Sentry	Diff
9d980f4	20.75 KiB	404.86 KiB	384.11 KiB
bd20fde	20.75 KiB	404.82 KiB	384.07 KiB

[codecov]

Codecov Report

Merging #2498 (976772a) into 8.0.0 (6bb5919) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##            8.0.0    #2498      +/-   ##
==========================================
- Coverage   78.44%   78.42%   -0.02%     
==========================================
  Files         242      242              
  Lines       22282    22277       -5     
  Branches     9839     9834       -5     
==========================================
- Hits        17479    17471       -8     
- Misses       4351     4354       +3     
  Partials      452      452              

Impacted Files	Coverage Δ
Sources/Sentry/SentryNetworkTracker.m	94.25% <100.00%> (-1.10%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6bb5919...976772a. Read the comment docs.

[kevinrenskers]

Same here.

codecov/project Failing after 1s — 78.42% (-0.02%) compared to 6bb5919

Quite annoying to have a red cross in the PR list, think a test failed, scroll through all the workflows hunting for the cross.. and then it's this thing.