til: measure til_module_render() durations

This stows the duration (in ticks (which are ms for now)) of a
given module context's most recent, as well as tracking the max,
in til_module_context_t.

For now it's also added to --print-module-contexts output, but
this is still rather primitive and nearly inscrutible in
practice...  that output is a flickery and unsorted mess during
playback.  But this is just a start.

Ticks may need to move up to microseconds if it'll also be the
units for measuring timings.  Right now things are slow enough
that the low-hanging fruit stand out as multiple if not dozens of
milliseconds so it's still useful for now.

1 files changed, 4 insertions, 0 deletions

diff --git a/src/til_module_context.h b/src/til_module_context.h
index e4c0bca..cb607f2 100644
--- a/src/til_module_context.h
+++ b/src/til_module_context.h
@@ -17,6 +17,10 @@ struct til_module_context_t {
 					 */
 
 	unsigned                refcount;
+
+	/* for profiling */
+	unsigned		last_render_duration, max_render_duration;
+	unsigned		renders_count;
 };
 
 void * til_module_context_new(const til_module_t *module, size_t size, til_stream_t *stream, unsigned seed, unsigned ticks, unsigned n_cpus, til_setup_t *setup);