Defer StringHttpMessageConverter Charset.availableCharsets() call [SPR-15502]

[spring-projects-issues]

Phil Webb opened SPR-15502 and commented

The StringHttpMessageConverter calls Charset.availableCharsets() which can be quite an expensive thing to do on startup. Switching it to obtain it on the first call may help improve startup times a little.

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Affects: 4.3.8

Referenced from: commits 90477b4, ee40310

[spring-projects-issues]

Phil Webb commented

Something like this: philwebb@29594a7