While doing performance testing of an application, we noticed multiple gigabytes of byte[] allocation happening. From the stack trace (condensed frames a bit),

ClientWebTarget.path -> ClientWebTarget.newInstance -> ClientConfiguration.init -> ResteasyProviderFactoryImpl.init -> Options.getProperty -> ServiceLoader$LazyClassPathLookupIterator.parse

Every time you create a new WebTarget, which is a frequent operation especially if you use any path params, we end up iterating classpath resources and reading from disk.

I created a proposal to help avoid this lookup sometimes:

https://github.com/resteasy/resteasy/pull/3373

but I am not sure this is the right fix.

Thank you for your consideration.