Refactor: use 'BLI_task_parallel_range' in Draw Cache

One drawback to trying to predict the number of threads that will be
used in the `task_graph` is that we are only sure of the number when the
threads are running.

Using `BLI_task_parallel_range` allows the driver to
choose the best thread distribution through `parallel_reduce`.

The benefit is most evident on hardware with fewer cores.

This is the result on an 4-core laptop:
||before:|after:
|---|---|---|
|large_mesh_editing:|Average: 5.203638 FPS|Average: 5.398925 FPS
||rdata 15ms iter 43ms (frame 193ms)|rdata 14ms iter 36ms (frame 187ms)

Differential Revision: https://developer.blender.org/D11558

1 files changed, 3 insertions, 3 deletions

diff --git a/source/blender/draw/intern/draw_manager_profiling.c b/source/blender/draw/intern/draw_manager_profiling.c
index 9bfc8d98fe4..783ec1b1d7d 100644
--- a/source/blender/draw/intern/draw_manager_profiling.c
+++ b/source/blender/draw/intern/draw_manager_profiling.c
@@ -41,7 +41,7 @@
 
 #define MAX_TIMER_NAME 32
 #define MAX_NESTED_TIMER 8
-#define CHUNK_SIZE 8
+#define MIM_RANGE_LEN 8
 #define GPU_TIMER_FALLOFF 0.1
 
 typedef struct DRWTimer {
@@ -82,7 +82,7 @@ void DRW_stats_begin(void)
 
   if (DTP.is_recording && DTP.timers == NULL) {
     DTP.chunk_count = 1;
-    DTP.timer_count = DTP.chunk_count * CHUNK_SIZE;
+    DTP.timer_count = DTP.chunk_count * MIM_RANGE_LEN;
     DTP.timers = MEM_callocN(sizeof(DRWTimer) * DTP.timer_count, "DRWTimer stack");
   }
   else if (!DTP.is_recording && DTP.timers != NULL) {
@@ -99,7 +99,7 @@ static DRWTimer *drw_stats_timer_get(void)
   if (UNLIKELY(DTP.timer_increment >= DTP.timer_count)) {
     /* Resize the stack. */
     DTP.chunk_count++;
-    DTP.timer_count = DTP.chunk_count * CHUNK_SIZE;
+    DTP.timer_count = DTP.chunk_count * MIM_RANGE_LEN;
     DTP.timers = MEM_recallocN(DTP.timers, sizeof(DRWTimer) * DTP.timer_count);
   }