feat: add set_tags for updating multiple tags in one go

[jpnurmi]

Makes a significant difference in terms of performance when updating multiple tags, because out-of-process handlers only need to flush the scope once.

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[JoshuaMoelans]

very nice, simple, yet elegant improvement 🚀 did you happen to benchmark how much this enhances performance 👀

[jpnurmi]

very nice, simple, yet elegant improvement 🚀 did you happen to benchmark how much this enhances performance 👀

Very rough numbers measured on Windows using QueryPerformanceFrequency + QueryPerformanceCounter:

Before (~2-4 ms)

sentry_set_tag("foo", "111");
sentry_set_tag("bar", "222");
sentry_set_tag("baz", "333");
sentry_set_tag("qux", "444");

After (~0.5-1 ms)

sentry_value_t tags = sentry_value_new_object();
sentry_value_set_by_key(tags, "foo", sentry_value_new_string("111"));
sentry_value_set_by_key(tags, "bar", sentry_value_new_string("222"));
sentry_value_set_by_key(tags, "baz", sentry_value_new_string("333"));
sentry_value_set_by_key(tags, "qux", sentry_value_new_string("444"));
sentry_set_tags(tags);

• with external crash reporter enabled, causing extra work during scope flush

[jpnurmi]

Q: set_tags vs. update_tags?

• sentry-unreal has USentryScope::SetTags
• sentry-native has update_context which is not the same thing but there's some similarity

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.23%. Comparing base (1047c2f) to head (bd13e8f).

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1993      +/-   ##
==========================================
- Coverage   75.56%   74.23%   -1.34%     
==========================================
  Files          91      104      +13     
  Lines       22129    25701    +3572     
  Branches     3948     4640     +692     
==========================================
+ Hits        16722    19078    +2356     
- Misses       4542     5314     +772     
- Partials      865     1309     +444     

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[jpnurmi]

Q: set_tags vs. update_tags?

• sentry-unreal has USentryScope::SetTags
• sentry-native has update_context which is not the same thing but there's some similarity

let's keep set_tags because it calls set_tag in a loop, so it's literally a plural version of set_tag