Identify and optimize expensive operations in frequently executed code paths to prevent performance bottlenecks. Hot paths include rendering loops, input event handlers, and frequently called utility functions.
Key optimization strategies:
Example of caching expensive system calls:
static bool checkDrmSyncobjTimelineSupport(int drmFD) {
static bool cached = false;
static bool result = false;
if (!cached) {
uint64_t cap = 0;
int ret = drmGetCap(drmFD, DRM_CAP_SYNCOBJ_TIMELINE, &cap);
result = (ret == 0 && cap != 0);
cached = true;
}
return result;
}
Example of early bailout optimization:
void damageEntireParent() {
CBox box = getParentBox();
if (box.empty()) // Skip expensive damage calculation
return;
g_pHyprRenderer->damageBox(box);
}
Avoid config lookups in hot paths like input handlers - instead store values in object state during initialization. This prevents “extreme performance kill” scenarios where expensive operations execute on every mouse movement or render frame.
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