musl - musl - an implementation of the standard library for Linux-based systems

musl - an implementation of the standard library for Linux-based systems

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author	Rich Felker <dalias@aerifal.cx>	2012年04月01日 23:22:16 -0400
committer	Rich Felker <dalias@aerifal.cx>	2012年04月01日 23:22:16 -0400
commit	4f346b08b33c9265c36fe8a14f5f908b1a9f296a (patch)
tree	d4e5c0c5b58302e39f56d550806d392e543974d3 /src
parent	4dbd94112ff74064554054b5ff27a7af547e4899 (diff)
download	musl-4f346b08b33c9265c36fe8a14f5f908b1a9f296a.tar.gz

improve name lookup performance in corner cases

the buffer in getaddrinfo really only matters when /etc/hosts is huge, but in that case, the huge number of syscalls resulting from a tiny buffer would seriously impact the performance of every name lookup. the buffer in __dns.c has also been enlarged a bit so that typical resolv.conf files will fit fully in the buffer. there's no need to make it so large as to dominate the syscall overhead for large files, because resolv.conf should never be large.

Diffstat (limited to 'src')

-rw-r--r--

src/network/__dns.c

-rw-r--r--

src/network/getaddrinfo.c

2 files changed, 2 insertions, 2 deletions

diff --git a/src/network/__dns.c b/src/network/__dns.c
index 786c054a..1464513d 100644
--- a/src/network/__dns.c
+++ b/src/network/__dns.c

@@ -29,7 +29,7 @@ int __dns_doqueries(unsigned char *dest, const char *name, int *rr, int rrcnt)

time_t t0 = time(0);

int fd;

FILE *f, _f;

- unsigned char _buf[64];

+ unsigned char _buf[256];

char line[64], *s, *z;

union {

struct sockaddr_in sin;

diff --git a/src/network/getaddrinfo.c b/src/network/getaddrinfo.c
index e5fa5191..93c75160 100644
--- a/src/network/getaddrinfo.c
+++ b/src/network/getaddrinfo.c

@@ -61,7 +61,7 @@ int getaddrinfo(const char *host, const char *serv, const struct addrinfo *hint,

//char hostbuf[256];

char line[512];

FILE *f, _f;

- unsigned char _buf[64];

+ unsigned char _buf[1024];

char *z;

int result;

int cnt;

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