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.

diff --git a/src/network/__dns.c b/src/network/__dns.c
index 786c054a80d18292d8f7178002d34909df11de35..1464513df8b890c2c0e58324db53383a6ddb1343 100644 (file)
--- 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 e5fa5191c724a6d7f36eb91685eab36db5e3a30c..93c75160d649a5f1cf141eea3cb45bb5a44a2b3a 100644 (file)
--- 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;