performance of sentry.captureException

[glebv]

Hi, we carefully watch for any performance degradation in our code and discovered that the simple code can take up to 100ms
sentry.captureException( new Error(`loaded countries: ${json.data.countries.length}`) );
Here's the result of inspection

Could you suggest how to speedup the process? Is the way to do it fully asynchronous?

[AbhiPrasad]

Hey! Thanks for writing in. Upon looking at your profile breakdown, a majority of the time seems to be spent on the SourceMapConsumer and it's functions, which we don't import or use in the SDK at all.

It seems this is because the error.stack call here

sentry-javascript/packages/node/src/eventbuilder.ts

Line 25 in 92dd0ed

return stackParser(error.stack || '', 1);

has some Proxy wrapped around it that rewrites the stack trace - hence the get stack call.

We consider performance very important though, and I'll try to do some profiling on representative environments asap so we can compare with ourselves as well.

[glebv]

Hey, thanks for quick reply! I'm sorry, turns out our code is the main reason of the issue. We use not optimized code inside Error.prepareStackTrace method that leads to the delays.