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Optimize get_config_hash to avoid repeated snprintf calls

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Check if hash string is already formatted before calling snprintf,
since static variables in BSS are zero-initialized.
This commit is contained in:
David Woodhouse
2025-12-11 22:53:03 +09:00
parent 54ed6154eb
commit 58fddeb74f
1 changed files with 3 additions and 1 deletions
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4
esphome/core/buildinfo.cpp
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@@ -34,7 +34,9 @@ static uintptr_t build_time = (uintptr_t) &ESPHOME_BUILD_TIME;
const char *get_config_hash() {
static char hash_str[9];
snprintf(hash_str, sizeof(hash_str), "%08x", (uint32_t) config_hash);
if (!hash_str[0]) {
snprintf(hash_str, sizeof(hash_str), "%08x", (uint32_t) config_hash);
}
return hash_str;
}