perf: Don't update stats file when there are no incremented counters

This can happen for instance when ccache is about to exit with a fatal
error.

diff --git a/src/storage/local/LocalStorage.cpp b/src/storage/local/LocalStorage.cpp
index 5134c0b7f47189908008c67a2f291dea05523925..3e30fe8ce29a40ee5f7e27c424d14a10d6e59080 100644 (file)
--- a/src/storage/local/LocalStorage.cpp
+++ b/src/storage/local/LocalStorage.cpp
@@ -340,7 +340,7 @@ LocalStorage::LocalStorage(const Config& config) : m_config(config)
 void
 LocalStorage::finalize()
 {
-  if (m_config.stats()) {
+  if (m_config.stats() && !m_counter_updates.all_zero()) {
     // Pseudo-randomly choose one of the stats files in the 256 level 2
     // directories.
     const auto bucket = getpid() % 256;