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|
use criterion::criterion_group;
use criterion::criterion_main;
use criterion::BenchmarkId;
use criterion::Criterion;
use jj_lib::diff;
fn unchanged_lines(count: usize) -> (String, String) {
let mut lines = vec![];
for i in 0..count {
lines.push(format!("left line {i}\n"));
}
(lines.join(""), lines.join(""))
}
fn modified_lines(count: usize) -> (String, String) {
let mut left_lines = vec![];
let mut right_lines = vec![];
for i in 0..count {
left_lines.push(format!("left line {i}\n"));
right_lines.push(format!("right line {i}\n"));
}
(left_lines.join(""), right_lines.join(""))
}
fn reversed_lines(count: usize) -> (String, String) {
let mut left_lines = vec![];
for i in 0..count {
left_lines.push(format!("left line {i}\n"));
}
let mut right_lines = left_lines.clone();
right_lines.reverse();
(left_lines.join(""), right_lines.join(""))
}
fn bench_diff_lines(c: &mut Criterion) {
let mut group = c.benchmark_group("bench_diff_lines");
for count in [1000, 10000] {
let label = format!("{}k", count / 1000);
group.bench_with_input(
BenchmarkId::new("unchanged", &label),
&unchanged_lines(count),
|b, (left, right)| b.iter(|| diff::diff([left, right])),
);
group.bench_with_input(
BenchmarkId::new("modified", &label),
&modified_lines(count),
|b, (left, right)| b.iter(|| diff::diff([left, right])),
);
group.bench_with_input(
BenchmarkId::new("reversed", &label),
&reversed_lines(count),
|b, (left, right)| b.iter(|| diff::diff([left, right])),
);
}
}
fn bench_diff_git_git_read_tree_c(c: &mut Criterion) {
c.bench_function("bench_diff_git_git_read_tree_c", |b| {
b.iter(|| {
diff::diff([
r##"/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "#cache.h"
static int unpack(unsigned char *sha1)
{
void *buffer;
unsigned long size;
char type[20];
buffer = read_sha1_file(sha1, type, &size);
if (!buffer)
usage("unable to read sha1 file");
if (strcmp(type, "tree"))
usage("expected a 'tree' node");
while (size) {
int len = strlen(buffer)+1;
unsigned char *sha1 = buffer + len;
char *path = strchr(buffer, ' ')+1;
unsigned int mode;
if (size < len + 20 || sscanf(buffer, "%o", &mode) != 1)
usage("corrupt 'tree' file");
buffer = sha1 + 20;
size -= len + 20;
printf("%o %s (%s)\n", mode, path, sha1_to_hex(sha1));
}
return 0;
}
int main(int argc, char **argv)
{
int fd;
unsigned char sha1[20];
if (argc != 2)
usage("read-tree <key>");
if (get_sha1_hex(argv[1], sha1) < 0)
usage("read-tree <key>");
sha1_file_directory = getenv(DB_ENVIRONMENT);
if (!sha1_file_directory)
sha1_file_directory = DEFAULT_DB_ENVIRONMENT;
if (unpack(sha1) < 0)
usage("unpack failed");
return 0;
}
"##,
r##"/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "#cache.h"
static void create_directories(const char *path)
{
int len = strlen(path);
char *buf = malloc(len + 1);
const char *slash = path;
while ((slash = strchr(slash+1, '/')) != NULL) {
len = slash - path;
memcpy(buf, path, len);
buf[len] = 0;
mkdir(buf, 0700);
}
}
static int create_file(const char *path)
{
int fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0600);
if (fd < 0) {
if (errno == ENOENT) {
create_directories(path);
fd = open(path, O_WRONLY | O_TRUNC | O_CREAT, 0600);
}
}
return fd;
}
static int unpack(unsigned char *sha1)
{
void *buffer;
unsigned long size;
char type[20];
buffer = read_sha1_file(sha1, type, &size);
if (!buffer)
usage("unable to read sha1 file");
if (strcmp(type, "tree"))
usage("expected a 'tree' node");
while (size) {
int len = strlen(buffer)+1;
unsigned char *sha1 = buffer + len;
char *path = strchr(buffer, ' ')+1;
char *data;
unsigned long filesize;
unsigned int mode;
int fd;
if (size < len + 20 || sscanf(buffer, "%o", &mode) != 1)
usage("corrupt 'tree' file");
buffer = sha1 + 20;
size -= len + 20;
data = read_sha1_file(sha1, type, &filesize);
if (!data || strcmp(type, "blob"))
usage("tree file refers to bad file data");
fd = create_file(path);
if (fd < 0)
usage("unable to create file");
if (write(fd, data, filesize) != filesize)
usage("unable to write file");
fchmod(fd, mode);
close(fd);
free(data);
}
return 0;
}
int main(int argc, char **argv)
{
int fd;
unsigned char sha1[20];
if (argc != 2)
usage("read-tree <key>");
if (get_sha1_hex(argv[1], sha1) < 0)
usage("read-tree <key>");
sha1_file_directory = getenv(DB_ENVIRONMENT);
if (!sha1_file_directory)
sha1_file_directory = DEFAULT_DB_ENVIRONMENT;
if (unpack(sha1) < 0)
usage("unpack failed");
return 0;
}
"##,
])
});
});
}
criterion_group!(benches, bench_diff_lines, bench_diff_git_git_read_tree_c,);
criterion_main!(benches);
|
