From a3f5a8492a8bc62d8e2a639bd449b425efa66ce2 Mon Sep 17 00:00:00 2001
From: Jakob Unterwurzacher
Date: Fri, 3 Sep 2021 16:44:13 +0200
Subject: stupidgcm: batch C calls in chacha20poly1305_seal

Go has a high overhead for each C call, so batch
all openssl operations in the new C function chacha20poly1305_seal.

Benchmark results:

internal/speed$ go test -bench BenchmarkStupidXchacha -count 10 > old.txt
internal/speed$ go test -bench BenchmarkStupidXchacha -count 10 > new.txt

internal/speed$ benchstat old.txt new.txt
name             old time/op   new time/op   delta
StupidXchacha-4   8.79µs ± 1%   7.25µs ± 1%  -17.54%  (p=0.000 n=10+10)

name             old speed     new speed     delta
StupidXchacha-4  466MB/s ± 1%  565MB/s ± 1%  +21.27%  (p=0.000 n=10+10)
---
 internal/stupidgcm/Makefile | 7 +++++++
 1 file changed, 7 insertions(+)
 create mode 100644 internal/stupidgcm/Makefile

(limited to 'internal/stupidgcm/Makefile')

diff --git a/internal/stupidgcm/Makefile b/internal/stupidgcm/Makefile
new file mode 100644
index 0000000..19f9914
--- /dev/null
+++ b/internal/stupidgcm/Makefile
@@ -0,0 +1,7 @@
+.PHONY: gcc
+gcc:
+	gcc -Wall -Wextra -Wformat-security -Wconversion -lcrypto -c *.c
+
+.PHONY: format
+format:
+	clang-format --style=WebKit -i *.c
-- 
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