[taler-exchange] branch master updated: note on perf

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grothoff pushed a commit to branch master
in repository exchange.

The following commit(s) were added to refs/heads/master by this push:
     new 03e2aa71 note on perf
03e2aa71 is described below

commit 03e2aa71bc851239ca51c90ba81135ac54c2d5da
Author: Christian Grothoff <christian@grothoff.org>
AuthorDate: Sat Jun 19 17:29:07 2021 +0200

    note on perf
---
 src/exchange/taler-exchange-wirewatch.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/exchange/taler-exchange-wirewatch.c 
b/src/exchange/taler-exchange-wirewatch.c
index ab2bc381..40b962f8 100644
--- a/src/exchange/taler-exchange-wirewatch.c
+++ b/src/exchange/taler-exchange-wirewatch.c
@@ -458,6 +458,11 @@ history_cb (void *cls,
   }
 #endif
 
+  /* FIXME-PERFORMANCE: Consider using Postgres multi-valued insert here,
+     for up to 15x speed-up according to
+     
https://dba.stackexchange.com/questions/224989/multi-row-insert-vs-transactional-single-row-inserts#225006
+     (Note: this may require changing both the
+     plugin API as well as modifying how this function is called.) */
   qs = db_plugin->reserves_in_insert (db_plugin->cls,
                                       session,
                                       &details->reserve_pub,

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