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perf(test): write zero tor in 512KiB blocks (#8391)

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* perf(test): write zero tor in 512KiB blocks

* code review: allocate buffer on heap
This commit is contained in:
Yat Ho
2026-02-10 12:22:45 +08:00
committed by GitHub
parent df16feaa36
commit ea043d642b
1 changed files with 11 additions and 3 deletions
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14
tests/libtransmission/test-fixtures.h
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@@ -15,6 +15,7 @@
#include <string>
#include <string_view>
#include <thread>
#include <vector>
#include <event2/event.h>
@@ -435,10 +436,17 @@ protected:
auto fd = tr_sys_file_open(filename, TR_SYS_FILE_WRITE | TR_SYS_FILE_CREATE | TR_SYS_FILE_TRUNCATE, 0600);
auto const file_size = metainfo->file_size(i);
for (uint64_t j = 0; j < file_size; ++j)
static auto constexpr BlockSize = uint64_t{ 524288U };
auto buf = std::vector<char>(BlockSize);
for (uint64_t j = 0; j < file_size;)
{
auto const ch = partial && j < metainfo->piece_size() ? '\1' : '\0';
tr_sys_file_write(fd, &ch, 1, nullptr);
auto const piece_0_size = metainfo->piece_size(0U);
auto const is_one = partial && j < piece_0_size;
auto const n_write = std::min(BlockSize, (is_one ? piece_0_size : file_size) - j);
auto const ch = is_one ? '\1' : '\0';
std::fill_n(std::begin(buf), n_write, ch);
tr_sys_file_write(fd, std::data(buf), n_write, nullptr);
j += n_write;
}
tr_sys_file_close(fd);