Re: Proxy Objects & Interfaces In DBussy

On 24.05.2017 14:32, Simon McVittie wrote:

> On Wed, 24 May 2017 at 23:26:34 +1200, Lawrence D'Oliveiro wrote:

... cut ...

> Relying on introspection also adds extra, hidden method call round-trips,
> which have a measurable impact on performance (demonstrated in Will
> Thompson's experiments with removing introspection from telepathy-gabble's
> automated tests).
>
> If Introspect() is called synchronously, like any other synchronous method
> call it will block the main loop, and can result in message re-ordering[1],
> which in the worst case can break the intended semantics of D-Bus APIs.
>
> Introspection is mostly a development and debugging feature, and ideally
> nothing would rely on it at runtime.

For dynamic languages it is very important (and many times a boon) to have the introspection
facility available at runtime. A single implementation can then be used to add proper interfacing to
any DBus service at runtime. If done properly, it should not block anything.

---rony

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