feature request: speed up user's startup time as fast as possible #60
Description
Is your feature request related to a problem? Please describe.
When first time load a namespace from remote,
we will get
- 404: If namespace doesn't exists in remote, apollo-client will get 404, when first time load this namespace will be slow. fix in perf: speed up the first loading of namespace when startup meet 404 #61 already, will release with 2.3.0 in the feture.
- timeout: if apollo-configservice down, the loading of namespace will slow too. fix in perf: speed up when startup meet timeout #64
load 10 namespaces, timeusage
- 11494 ms when all of them meet 404
- 65929 ms when all of them meet timeout
Describe the solution you'd like
- decrease the total count of io
- fast fail when meet error
Additional context
404
The code to simulate 404 when load namespace.
Main.java
import com.ctrip.framework.apollo.Config;
import com.ctrip.framework.apollo.ConfigService;
import java.util.ArrayList;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Main {
private static final Logger log = LoggerFactory.getLogger(Main.class);
public static void main(String[] args) {
System.setProperty("app.id", "custom");
System.setProperty("apollo.meta", "http://81.68.181.139:8080");
// System.setProperty("apollo.loadConfigQPS", "5");
runAndCountTime("load multiple namespace", () -> load());
}
static void load() {
List<String> list = new ArrayList<>();
for (int i = 1; i <= 10; i++) {
list.add("ns" + i);
}
log.info("try to load {} namespace in list {}", list.size(), list);
for (String ns : list) {
runAndCountTime("load namespace " + ns, () -> {
Config config = ConfigService.getConfig(ns);
log.info("load namespace '{}' finished. k1 = {}", ns, config.getProperty("k1", null));
});
}
}
static void runAndCountTime(String message, Runnable runnable) {
log.info("start {}", message);
long s = System.currentTimeMillis();
runnable.run();
long end = System.currentTimeMillis();
log.info("end {} time use {} ms", message, end - s);
}
}the output log
before-change.log
timeout
The code to simulate timeout when load namespace.
Timeout.java
import com.ctrip.framework.apollo.Config;
import com.ctrip.framework.apollo.ConfigService;
import java.util.ArrayList;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class Timeout {
private static final Logger log = LoggerFactory.getLogger(Timeout.class);
public static void main(String[] args) {
System.setProperty("app.id", "custom");
// System.setProperty("apollo.meta", "http://81.68.181.139:8080");
// wrong meta address will cause timeout
System.setProperty("apollo.meta", "http://81.68.181.100:8080");
// System.setProperty("apollo.loadConfigQPS", "5");
runAndCountTime("load multiple namespace", () -> load());
}
static void load() {
List<String> list = new ArrayList<>();
for (int i = 1; i <= 10; i++) {
list.add("ns" + i);
}
log.info("try to load {} namespace in list {}", list.size(), list);
for (String ns : list) {
runAndCountTime("load namespace " + ns, () -> {
Config config = ConfigService.getConfig(ns);
log.info("load namespace '{}' finished. k1 = {}", ns, config.getProperty("k1", null));
});
}
}
static void runAndCountTime(String message, Runnable runnable) {
log.info("start {}", message);
long s = System.currentTimeMillis();
runnable.run();
long end = System.currentTimeMillis();
log.info("end {} time use {} ms", message, end - s);
}
}the output log
timeout-before-change.log