From fb82ee09a7963f74898c62091f5bce9cc1b1c388 Mon Sep 17 00:00:00 2001
From: =?utf8?q?Fabian=20Kl=C3=B6tzl?= <fabian@kloetzl.info>
Date: Wed, 21 Nov 2018 12:20:12 +0100
Subject: [PATCH] improve parsing performance

Doubles throughput; can now parse FASTA at 2GB/s.
---
 kseq.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kseq.h b/kseq.h
index 2f94a64..99c9ea2 100644
--- a/kseq.h
+++ b/kseq.h
@@ -108,8 +108,8 @@ typedef struct __kstring_t {
 				} else break;											\
 			}															\
 			if (delimiter == KS_SEP_LINE) { \
-				for (i = ks->begin; i < ks->end; ++i) \
-					if (ks->buf[i] == '\n') break; \
+				unsigned char *sep = memchr(ks->buf + ks->begin, '\n', ks->end - ks->begin); \
+				i = sep != NULL ? sep - ks->buf : ks->end;				\
 			} else if (delimiter > KS_SEP_MAX) {						\
 				for (i = ks->begin; i < ks->end; ++i)					\
 					if (ks->buf[i] == delimiter) break;					\
-- 
2.47.3