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https://github.com/git-for-windows/git.git
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438886aecb
To test Git's behavior with very large pack files, we need a way to generate such files quickly. A naive approach using only readily-available Git commands would take over 10 hours for a 4GB pack file, which is prohibitive. Side-stepping Git's machinery and actual zlib compression by writing uncompressed content with the appropriate zlib header makes things much faster. The fastest method using this approach generates many small, unreachable blob objects and takes about 1.5 minutes for 4GB. However, this cannot be used because we need to test git clone, which requires a reachable commit history. Generating many reachable commits with small, uncompressed blobs takes about 4 minutes for 4GB. But this approach 1) does not reproduce the issues we want to fix (which require individual objects larger than 4GB) and 2) is comparatively slow because of the many SHA-1 calculations. The approach taken here generates a single large blob (filled with NUL bytes), along with the trees and commits needed to make it reachable. This takes about 2.5 minutes for 4.5GB, which is the fastest option that produces a valid, clonable repository with an object large enough to trigger the bugs we want to test. Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
93 lines
4.2 KiB
C
93 lines
4.2 KiB
C
#ifndef TEST_TOOL_H
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#define TEST_TOOL_H
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#include "git-compat-util.h"
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int cmd__advise_if_enabled(int argc, const char **argv);
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int cmd__bitmap(int argc, const char **argv);
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int cmd__bloom(int argc, const char **argv);
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int cmd__bundle_uri(int argc, const char **argv);
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int cmd__cache_tree(int argc, const char **argv);
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int cmd__chmtime(int argc, const char **argv);
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int cmd__config(int argc, const char **argv);
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int cmd__crontab(int argc, const char **argv);
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int cmd__csprng(int argc, const char **argv);
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int cmd__date(int argc, const char **argv);
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int cmd__delta(int argc, const char **argv);
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int cmd__delete_gpgsig(int argc, const char **argv);
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int cmd__dir_iterator(int argc, const char **argv);
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int cmd__drop_caches(int argc, const char **argv);
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int cmd__dump_cache_tree(int argc, const char **argv);
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int cmd__dump_fsmonitor(int argc, const char **argv);
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int cmd__dump_split_index(int argc, const char **argv);
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int cmd__dump_untracked_cache(int argc, const char **argv);
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int cmd__dump_reftable(int argc, const char **argv);
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int cmd__env_helper(int argc, const char **argv);
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int cmd__example_tap(int argc, const char **argv);
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int cmd__find_pack(int argc, const char **argv);
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int cmd__fsmonitor_client(int argc, const char **argv);
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int cmd__genrandom(int argc, const char **argv);
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int cmd__genzeros(int argc, const char **argv);
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int cmd__getcwd(int argc, const char **argv);
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int cmd__hashmap(int argc, const char **argv);
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int cmd__hash_speed(int argc, const char **argv);
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int cmd__hexdump(int argc, const char **argv);
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int cmd__json_writer(int argc, const char **argv);
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int cmd__lazy_init_name_hash(int argc, const char **argv);
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int cmd__match_trees(int argc, const char **argv);
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int cmd__mergesort(int argc, const char **argv);
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int cmd__mktemp(int argc, const char **argv);
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int cmd__name_hash(int argc, const char **argv);
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int cmd__online_cpus(int argc, const char **argv);
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int cmd__pack_deltas(int argc, const char **argv);
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int cmd__pack_mtimes(int argc, const char **argv);
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int cmd__parse_options(int argc, const char **argv);
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int cmd__parse_options_flags(int argc, const char **argv);
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int cmd__parse_pathspec_file(int argc, const char** argv);
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int cmd__parse_subcommand(int argc, const char **argv);
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int cmd__partial_clone(int argc, const char **argv);
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int cmd__path_utils(int argc, const char **argv);
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int cmd__path_walk(int argc, const char **argv);
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int cmd__pcre2_config(int argc, const char **argv);
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int cmd__pkt_line(int argc, const char **argv);
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int cmd__proc_receive(int argc, const char **argv);
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int cmd__progress(int argc, const char **argv);
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int cmd__reach(int argc, const char **argv);
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int cmd__read_cache(int argc, const char **argv);
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int cmd__read_graph(int argc, const char **argv);
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int cmd__read_midx(int argc, const char **argv);
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int cmd__ref_store(int argc, const char **argv);
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int cmd__rot13_filter(int argc, const char **argv);
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int cmd__regex(int argc, const char **argv);
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int cmd__repository(int argc, const char **argv);
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int cmd__revision_walking(int argc, const char **argv);
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int cmd__run_command(int argc, const char **argv);
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int cmd__scrap_cache_tree(int argc, const char **argv);
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int cmd__serve_v2(int argc, const char **argv);
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int cmd__sha1(int argc, const char **argv);
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int cmd__sha1_is_sha1dc(int argc, const char **argv);
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int cmd__sha1_unsafe(int argc, const char **argv);
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int cmd__sha256(int argc, const char **argv);
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int cmd__sigchain(int argc, const char **argv);
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int cmd__simple_ipc(int argc, const char **argv);
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int cmd__string_list(int argc, const char **argv);
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int cmd__submodule(int argc, const char **argv);
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int cmd__submodule_config(int argc, const char **argv);
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int cmd__submodule_nested_repo_config(int argc, const char **argv);
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int cmd__subprocess(int argc, const char **argv);
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int cmd__synthesize(int argc, const char **argv);
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int cmd__trace2(int argc, const char **argv);
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int cmd__truncate(int argc, const char **argv);
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int cmd__userdiff(int argc, const char **argv);
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int cmd__xml_encode(int argc, const char **argv);
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int cmd__wildmatch(int argc, const char **argv);
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#ifdef GIT_WINDOWS_NATIVE
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int cmd__windows_named_pipe(int argc, const char **argv);
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#endif
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int cmd__write_cache(int argc, const char **argv);
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int cmd__zlib(int argc, const char **argv);
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int cmd_hash_impl(int ac, const char **av, int algo, int unsafe);
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#endif
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