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Cockatrice/tests/oracle/oracle_importer_benchmark_test.cpp
Lukas Brübach 99d8db3398 [Oracle] Parse sets lazily to slash importer peak memory 
- Add a raw JSON scanner that splits the document into per-set byte ranges
  without materializing the JSON tree
- Keep only the raw document bytes and parse one set at a time in startImport
- Take readSetsFromByteArray by value so the wizard's buffer is moved, not copied
- Clear the retained raw data in releaseSetData()/clear()
- Cover the scanner and lazy parsing with tests

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2026-09-04 22:14:21 +02:00

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#include "../../oracle/src/oracleimporter.h"
#include "gtest/gtest.h"
#include <QBuffer>
#include <QCoreApplication>
#include <QDebug>
#include <QElapsedTimer>
#include <QEventLoop>
#include <QFile>
#include <QJsonArray>
#include <QJsonDocument>
#include <QJsonObject>
#include <QNetworkAccessManager>
#include <QNetworkReply>
#include <QNetworkRequest>
#include <QTimer>
#include <QUrl>
#include <libcockatrice/interfaces/noop_card_set_priority_controller.h>
#if defined(HAS_LZMA)
#include "../../oracle/src/lzma/decompress.h"
#endif
#if defined(HAS_ZLIB)
#include "../../oracle/src/zip/unzip.h"
#endif
#if defined(Q_OS_MACOS)
#include <mach/mach.h>
#include <sys/resource.h>
#endif
// Helper: build a synthetic MTGJSON-style JSON with the given number of sets and cards per set
static QByteArray buildSyntheticData(int numSets, int cardsPerSet)
{
QJsonObject dataObj;
for (int s = 0; s < numSets; ++s) {
QJsonArray cardsArray;
for (int c = 0; c < cardsPerSet; ++c) {
QJsonObject card;
card["name"] = QString("Card %1").arg(s * cardsPerSet + c);
card["text"] = "This is a test card with some rules text.";
card["layout"] = "normal";
card["manaCost"] = "{W}";
card["type"] = "Creature — Human";
card["power"] = "2";
card["toughness"] = "2";
card["colors"] = QJsonArray{"W"};
card["colorIdentity"] = QJsonArray{"W"};
card["types"] = QJsonArray{"Creature"};
// Real MTGJSON types: floats and booleans, not strings. This
// exercises the QVariant coercion in the property reader.
card["convertedManaCost"] = 1.0;
card["manaValue"] = 1.0;
card["isOnlineOnly"] = false;
card["isRebalanced"] = false;
QJsonObject legalities;
legalities["standard"] = "legal";
legalities["modern"] = "legal";
legalities["legacy"] = "legal";
legalities["vintage"] = "legal";
legalities["commander"] = "legal";
card["legalities"] = legalities;
QJsonObject identifiers;
identifiers["scryfallId"] = QString("id-%1-%2").arg(s).arg(c);
card["identifiers"] = identifiers;
// In AllPrintings, number and rarity are flat fields on the card
// object, exactly as set below.
card["number"] = QString::number(c + 1);
card["rarity"] = "common";
cardsArray.append(card);
}
QJsonObject setObj;
setObj["code"] = QString("T%1").arg(s, 2, 10, QChar('0'));
setObj["name"] = QString("Test Set %1").arg(s);
setObj["type"] = "expansion";
setObj["releaseDate"] = "2024-01-01";
setObj["cards"] = cardsArray;
dataObj[QString("T%1").arg(s, 2, 10, QChar('0'))] = setObj;
}
QJsonObject root;
root["data"] = dataObj;
return QJsonDocument(root).toJson(QJsonDocument::Compact);
}
// ============================================================================
// Import throughput benchmark
// ============================================================================
TEST(OracleBenchmark, ImportThroughput)
{
static constexpr int numSets = 10;
static constexpr int cardsPerSet = 500;
QByteArray data = buildSyntheticData(numSets, cardsPerSet);
OracleImporter importer;
// Phase 1: Parse JSON
QElapsedTimer timer;
timer.start();
bool ok = importer.readSetsFromByteArray(data);
ASSERT_TRUE(ok);
qint64 parseMs = timer.elapsed();
// Phase 2: Import cards
timer.restart();
int importedSets = importer.startImport();
qint64 importMs = timer.elapsed();
int totalImported = 0;
for (const auto &card : importer.getCardList()) {
Q_UNUSED(card);
totalImported++;
}
// The fixture generates globally unique card names, so the expected
// counts are exact: a regression here means cards were dropped.
ASSERT_EQ(importedSets, numSets);
ASSERT_EQ(totalImported, numSets * cardsPerSet);
// Real-data probe: numeric convertedManaCost must be coerced to text
// (regression for the QJsonValue::toString() reader in #7214).
auto probeCard = importer.getCardList().value("Card 0");
ASSERT_FALSE(probeCard.isNull());
ASSERT_EQ(probeCard->getProperty("cmc"), "1");
qDebug().noquote()
<< QString("Oracle Import Benchmark: %1 sets, %2 unique cards").arg(importedSets).arg(totalImported);
qDebug().noquote() << QString(" JSON parse: %1 ms").arg(parseMs);
qDebug().noquote() << QString(" Card import: %1 ms").arg(importMs);
qDebug().noquote() << QString(" Total: %1 ms").arg(parseMs + importMs);
if (importMs > 0) {
qDebug().noquote() << QString(" Throughput: %1 cards/sec")
.arg(static_cast<double>(totalImported) / importMs * 1000.0, 0, 'f', 0);
}
}
// ============================================================================
// readSetsFromByteArray benchmark
// ============================================================================
TEST(OracleBenchmark, ParseJsonThroughput)
{
static constexpr int numSets = 20;
static constexpr int cardsPerSet = 1000;
QByteArray data = buildSyntheticData(numSets, cardsPerSet);
// Run 5 iterations and report average
static constexpr int iterations = 5;
qint64 totalMs = 0;
for (int i = 0; i < iterations; ++i) {
OracleImporter importer;
QByteArray source = data;
QElapsedTimer timer;
timer.start();
bool ok = importer.readSetsFromByteArray(std::move(source));
ASSERT_TRUE(ok);
totalMs += timer.elapsed();
}
qint64 avgMs = totalMs / iterations;
qDebug().noquote() << QString("Parse Benchmark (%1 iterations): avg %2 ms for %3 sets x %4 cards")
.arg(iterations)
.arg(avgMs)
.arg(numSets)
.arg(cardsPerSet);
}
// ============================================================================
// Split card merging benchmark
// ============================================================================
TEST(OracleBenchmark, SplitCardMerging)
{
static constexpr int numSplitCards = 1000;
QJsonArray cardsList;
for (int i = 0; i < numSplitCards; ++i) {
QJsonObject face1;
face1["name"] = QString("Fire %1 // Ice %1").arg(i);
face1["text"] = "Fire side text.";
face1["layout"] = "split";
face1["side"] = "a";
face1["faceName"] = QString("Fire %1").arg(i);
face1["colors"] = QJsonArray{"R"};
face1["colorIdentity"] = QJsonArray{"R"};
face1["types"] = QJsonArray{"Instant"};
face1["manaCost"] = "{R}";
face1["legalities"] = QJsonObject{{"standard", "not_legal"}};
face1["identifiers"] = QJsonObject{{"scryfallId", QString("f-%1").arg(i)}};
face1["number"] = QString::number(i + 1);
face1["rarity"] = "uncommon";
QJsonObject face2;
face2["name"] = QString("Fire %1 // Ice %1").arg(i);
face2["text"] = "Ice side text.";
face2["layout"] = "split";
face2["side"] = "b";
face2["faceName"] = QString("Ice %1").arg(i);
face2["colors"] = QJsonArray{"U"};
face2["colorIdentity"] = QJsonArray{"U"};
face2["types"] = QJsonArray{"Instant"};
face2["manaCost"] = "{U}";
face2["legalities"] = QJsonObject{{"standard", "not_legal"}};
face2["identifiers"] = QJsonObject{{"scryfallId", QString("i-%1").arg(i)}};
face2["number"] = QString::number(i + 1);
face2["rarity"] = "uncommon";
cardsList.append(face1);
cardsList.append(face2);
}
NoopCardSetPriorityController controller;
OracleImporter importer;
CardSetPtr set = CardSet::newInstance(&controller, "TST", "Split Test");
QElapsedTimer timer;
timer.start();
int count = importer.importCardsFromSet(set, cardsList);
qint64 ms = timer.elapsed();
ASSERT_EQ(count, numSplitCards);
qDebug().noquote() << QString("Split Card Merge Benchmark: %1 cards in %2 ms (%3 cards/sec)")
.arg(count)
.arg(ms)
.arg(ms > 0 ? static_cast<double>(count) / ms * 1000.0 : 0.0, 0, 'f', 0);
}
// ============================================================================
// sortAndReduceColors microbenchmark
// ============================================================================
// We can't call sortAndReduceColors directly (it's static), so we benchmark
// through importCardsFromSet with color properties.
TEST(OracleBenchmark, ImportCardsWithColors)
{
static constexpr int numCards = 10000;
NoopCardSetPriorityController controller;
OracleImporter importer;
CardSetPtr set = CardSet::newInstance(&controller, "TST", "Color Test");
QJsonArray cardsList;
for (int i = 0; i < numCards; ++i) {
QJsonObject card;
card["name"] = QString("Color Card %1").arg(i);
card["text"] = "Rules text.";
card["layout"] = "normal";
card["manaCost"] = "{W}";
card["type"] = "Creature — Human";
card["types"] = QJsonArray{"Creature"};
card["colors"] = QJsonArray{"B", "R", "G", "W", "U"};
card["colorIdentity"] = QJsonArray{"B", "R", "G", "W", "U"};
card["number"] = QString::number(i + 1);
card["rarity"] = "common";
card["legalities"] = QJsonObject{{"standard", "legal"}};
card["identifiers"] = QJsonObject{{"scryfallId", QString("c-%1").arg(i)}};
cardsList.append(card);
}
QElapsedTimer timer;
timer.start();
int count = importer.importCardsFromSet(set, cardsList);
qint64 ms = timer.elapsed();
ASSERT_EQ(count, numCards);
qDebug().noquote() << QString("Import with Colors Benchmark: %1 cards in %2 ms (%3 cards/sec)")
.arg(count)
.arg(ms)
.arg(ms > 0 ? static_cast<double>(count) / ms * 1000.0 : 0.0, 0, 'f', 0);
}
// ============================================================================
// RAM usage measurement
// ============================================================================
// Mirrors the default AllPrintings URL selection in oracle/src/pages.cpp.
#if defined(HAS_LZMA)
static const QUrl kDefaultAllPrintingsUrl("https://www.mtgjson.com/api/v5/AllPrintings.json.xz");
#elif defined(HAS_ZLIB)
static const QUrl kDefaultAllPrintingsUrl("https://www.mtgjson.com/api/v5/AllPrintings.json.zip");
#else
static const QUrl kDefaultAllPrintingsUrl("https://www.mtgjson.com/api/v5/AllPrintings.json");
#endif
// Magic bytes also from oracle/src/pages.cpp
static const QByteArray kXzSignature("\xFD\x37\x7A\x58\x5A", 6);
static const QByteArray kZipSignature("PK");
struct MemorySnapshot
{
qint64 peakRssKb = -1; // process high-water mark (VmHWM on Linux, ru_maxrss on macOS)
qint64 rssKb = -1; // current resident set size
bool available = false;
static MemorySnapshot current()
{
MemorySnapshot snap;
#if defined(Q_OS_LINUX)
QFile statusFile("/proc/self/status");
if (statusFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
// /proc files report size() == 0, so atEnd() is immediately true: read everything first.
const QList<QByteArray> lines = statusFile.readAll().split('\n');
for (const QByteArray &line : lines) {
if (line.startsWith("VmHWM:")) {
snap.peakRssKb = line.mid(6).trimmed().split(' ').value(0).toLongLong();
} else if (line.startsWith("VmRSS:")) {
snap.rssKb = line.mid(6).trimmed().split(' ').value(0).toLongLong();
}
}
snap.available = snap.peakRssKb >= 0;
}
#elif defined(Q_OS_MACOS)
struct rusage usage;
if (getrusage(RUSAGE_SELF, &usage) == 0) {
snap.peakRssKb = usage.ru_maxrss / 1024; // bytes -> kB
snap.available = snap.peakRssKb >= 0;
}
// getrusage has no current-RSS equivalent; task_info's resident_size
// is the closest macOS analog to Linux VmRSS.
mach_task_basic_info info = {};
mach_msg_type_number_t count = MACH_TASK_BASIC_INFO_COUNT;
if (task_info(mach_task_self(), MACH_TASK_BASIC_INFO, reinterpret_cast<task_info_t>(&info), &count) ==
KERN_SUCCESS) {
snap.rssKb = info.resident_size / 1024;
}
#endif
return snap;
}
};
static QString formatKb(qint64 kb)
{
if (kb < 0) {
return "N/A";
}
return QString("%1 MB").arg(kb / 1024.0, 0, 'f', 1);
}
static void logRamPhase(const QString &phase, const MemorySnapshot &baseline, const MemorySnapshot &current)
{
if (!baseline.available || !current.available) {
qDebug().noquote() << QString(" %1: memory stats unavailable on this platform").arg(phase);
return;
}
// VmHWM / ru_maxrss are monotonically non-decreasing high-water marks, so a
// peak-based delta between phases is ~0.0 MB by construction once the
// fixture build has set the process peak. The live signals are current RSS
// and the process peak; the delta is meaningful only where the baseline was
// taken immediately before the phase it measures (e.g. the import phase,
// which compares afterParse against afterImport).
QString rssDelta = "N/A";
if (current.rssKb >= 0 && baseline.rssKb >= 0) {
rssDelta = formatKb(current.rssKb - baseline.rssKb);
}
qDebug().noquote() << QString(" %1: current RSS %2 | delta vs baseline %3 | process peak %4")
.arg(phase)
.arg(formatKb(current.rssKb))
.arg(rssDelta)
.arg(formatKb(current.peakRssKb));
}
// Decompresses the download payload when the default URL is a compressed build,
// mirroring the wizard's magic-byte handling in oracle/src/pages.cpp.
static QByteArray decompressSetsData(const QByteArray &payload)
{
if (payload.startsWith(kXzSignature)) {
#if defined(HAS_LZMA)
QBuffer inBuffer(const_cast<QByteArray *>(&payload));
QByteArray out;
QBuffer outBuffer(&out);
inBuffer.open(QIODevice::ReadOnly);
outBuffer.open(QIODevice::WriteOnly);
XzDecompressor xz;
if (!xz.decompress(&inBuffer, &outBuffer)) {
qDebug() << "RAM benchmark: xz decompression failed";
return {};
}
return out;
#else
qDebug() << "RAM benchmark: download is xz-compressed but this build has no LZMA support";
return {};
#endif
}
if (payload.startsWith(kZipSignature)) {
#if defined(HAS_ZLIB)
QBuffer inBuffer(const_cast<QByteArray *>(&payload));
inBuffer.open(QIODevice::ReadOnly);
UnZip unzip;
if (unzip.openArchive(&inBuffer) != UnZip::Ok) {
qDebug() << "RAM benchmark: zip archive open failed";
return {};
}
if (unzip.fileList().size() != 1) {
qDebug() << "RAM benchmark: zip archive doesn't contain exactly one file";
return {};
}
QByteArray out;
QBuffer outBuffer(&out);
outBuffer.open(QIODevice::WriteOnly);
const auto errorCode = unzip.extractFile(unzip.fileList().value(0), &outBuffer);
unzip.closeArchive();
if (errorCode != UnZip::Ok) {
qDebug() << "RAM benchmark: zip extraction failed";
return {};
}
return out;
#else
qDebug() << "RAM benchmark: download is zip-compressed but this build has no zlib support";
return {};
#endif
}
return payload;
}
TEST(OracleBenchmark, ImportRamUsage)
{
static constexpr int numSets = 30;
static constexpr int cardsPerSet = 2000; // ~60k cards, roughly AllPrintings scale
// Baseline must precede the fixture build: a high-water mark set while
// generating the synthetic JSON would otherwise mask the importer phases.
// Where memory stats are unavailable (Windows), skip before doing the
// 60k-card fixture build, which would otherwise be pure wasted work.
const MemorySnapshot baseline = MemorySnapshot::current();
if (!baseline.available) {
GTEST_SKIP() << "Memory stats unavailable on this platform";
}
const QByteArray data = buildSyntheticData(numSets, cardsPerSet);
// The fixture build leaves freed-but-unreturned arenas behind (current RSS
// rarely falls once glibc allocates). Baseline immediately after it so the
// parse phase measures only the importer's own growth (~40 MB) rather than
// swallowing the fixture builder's spike.
const MemorySnapshot afterFixture = MemorySnapshot::current();
logRamPhase("fixture build", baseline, afterFixture);
NoopCardSetPriorityController controller;
OracleImporter importer;
QElapsedTimer timer;
timer.start();
ASSERT_TRUE(importer.readSetsFromByteArray(std::move(data)));
const qint64 parseMs = timer.elapsed();
const MemorySnapshot afterParse = MemorySnapshot::current();
timer.restart();
const int importedSets = importer.startImport();
const qint64 importMs = timer.elapsed();
const MemorySnapshot afterImport = MemorySnapshot::current();
importer.releaseSetData();
const MemorySnapshot afterRelease = MemorySnapshot::current();
const int totalCards = importer.getCardList().size();
qDebug().noquote() << QString("Oracle RAM Benchmark (synthetic): %1 sets, %2 cards, %3 MB JSON")
.arg(importedSets)
.arg(totalCards)
.arg(data.size() / (1024.0 * 1024.0), 0, 'f', 1);
qDebug().noquote() << QString(" JSON parse: %1 ms").arg(parseMs);
qDebug().noquote() << QString(" Card import: %1 ms").arg(importMs);
logRamPhase("parse", afterFixture, afterParse);
logRamPhase("import", afterParse, afterImport);
logRamPhase("after releaseSetData()", afterImport, afterRelease);
// Freeing the parsed tree rarely moves current RSS (allocator reuse), so the
// meaningful signal that release actually dropped the buffers is emptiness,
// not an RSS delta.
ASSERT_TRUE(importer.getSets().isEmpty());
}
TEST(OracleBenchmark, ImportRamUsageAllPrintings)
{
// Only "1" enables the download: unset (the default and the CI setup) and
// an explicit "0" both disable it.
bool envOk = false;
const int enabled = qEnvironmentVariableIntValue("COCKATRICE_ORACLE_RAM_BENCHMARK", &envOk);
if (!envOk || enabled == 0) {
GTEST_SKIP() << "Set COCKATRICE_ORACLE_RAM_BENCHMARK=1 to download the real AllPrintings dataset for this "
"RAM benchmark. Default URL: "
<< kDefaultAllPrintingsUrl.toDisplayString().toStdString();
}
// Baseline must precede the request so the phase covers the download +
// decompress step, including the payload materialized by readAll().
const MemorySnapshot baseline = MemorySnapshot::current();
if (!baseline.available) {
GTEST_SKIP() << "Memory stats unavailable on this platform";
}
QNetworkAccessManager nam;
QNetworkRequest request(kDefaultAllPrintingsUrl);
request.setHeader(QNetworkRequest::UserAgentHeader, "Cockatrice Oracle RAM benchmark");
QNetworkReply *reply = nam.get(request);
QEventLoop loop;
QTimer timeoutTimer;
timeoutTimer.setSingleShot(true);
bool timedOut = false;
QObject::connect(reply, &QNetworkReply::finished, &loop, &QEventLoop::quit);
QObject::connect(&timeoutTimer, &QTimer::timeout, &loop, [&] {
timedOut = true;
reply->abort();
});
timeoutTimer.start(10 * 60 * 1000);
loop.exec();
timeoutTimer.stop();
// abort() leaves reply->error() as OperationCanceledError, so a timed-out
// download takes the same GTEST_SKIP path as any other network error
// instead of reading a truncated body and failing the parse below.
if (timedOut || reply->error() != QNetworkReply::NoError) {
GTEST_SKIP() << "Download failed: " << reply->errorString().toStdString();
}
const QByteArray payload = reply->readAll();
reply->deleteLater();
// mtgjson can answer 200 with an HTML page (mirrors the wizard's '<' check
// in pages.cpp); reject it before trying to decompress/parse.
if (payload.startsWith("<")) {
GTEST_SKIP() << "Download returned a non-JSON body (HTML page instead of data), skipping";
}
const QByteArray setsData = decompressSetsData(payload);
const MemorySnapshot afterDownload = MemorySnapshot::current();
if (setsData.isEmpty()) {
GTEST_SKIP() << "No data to import (download or decompression failed)";
}
NoopCardSetPriorityController controller;
OracleImporter importer;
QElapsedTimer timer;
timer.start();
ASSERT_TRUE(importer.readSetsFromByteArray(std::move(setsData)));
const qint64 parseMs = timer.elapsed();
const MemorySnapshot afterParse = MemorySnapshot::current();
timer.restart();
const int importedSets = importer.startImport();
const qint64 importMs = timer.elapsed();
const MemorySnapshot afterImport = MemorySnapshot::current();
importer.releaseSetData();
const MemorySnapshot afterRelease = MemorySnapshot::current();
const int totalCards = importer.getCardList().size();
qDebug().noquote() << QString("Oracle RAM Benchmark (real AllPrintings): %1 sets, %2 unique cards")
.arg(importedSets)
.arg(totalCards);
qDebug().noquote() << QString(" URL: %1").arg(kDefaultAllPrintingsUrl.toDisplayString());
qDebug().noquote() << QString(" Downloaded: %1 MB, decompressed: %2 MB")
.arg(payload.size() / (1024.0 * 1024.0), 0, 'f', 1)
.arg(setsData.size() / (1024.0 * 1024.0), 0, 'f', 1);
qDebug().noquote() << QString(" JSON parse: %1 ms").arg(parseMs);
qDebug().noquote() << QString(" Card import: %1 ms").arg(importMs);
logRamPhase("download+decompress", baseline, afterDownload);
logRamPhase("parse", afterDownload, afterParse);
logRamPhase("import", afterParse, afterImport);
logRamPhase("after releaseSetData()", afterImport, afterRelease);
}
int main(int argc, char **argv)
{
// Required for the event loop used by the real-AllPrintings download benchmark
QCoreApplication app(argc, argv);
::testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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