add perf output

1 files changed, 23 insertions, 2 deletions

diff --git a/docs/note-2021-09-15.md b/docs/note-2021-09-15.md
index 8caf1cc..4b9dc9c 100644
--- a/docs/note-2021-09-15.md
+++ b/docs/note-2021-09-15.md
@@ -1,6 +1,27 @@
 Added storage worker
 ====================
 
-## Time
+This worker is charged to make IO calls when storing chunk data. This way writes
+are asynchronous and `matchChunks` can continue without being interrupted.
 
-`14:49:00.221` -> `14:51:34.009` = `00:02:33.788`
+perf output
+-----------
+
+```
+        238 109,33 msec task-clock                #    1,597 CPUs utilized          
+           683 140      context-switches          #    0,003 M/sec                  
+            13 181      cpu-migrations            #    0,055 K/sec                  
+            65 129      page-faults               #    0,274 K/sec                  
+   657 925 115 947      cycles                    #    2,763 GHz                    
+ 1 007 554 842 920      instructions              #    1,53  insn per cycle         
+   135 946 178 728      branches                  #  570,940 M/sec                  
+     2 360 293 394      branch-misses             #    1,74% of all branches        
+
+     149,118546976 seconds time elapsed
+
+     226,961825000 seconds user
+      18,354254000 seconds sys
+```
+
+This is not a huge improvement, but at the same time, hashes are stored which
+makes them a lot faster to recover (no need for rehashing every existing chunk).