feat: add req duration measurement

src/commands/balance.rs

@@ -23,11 +23,18 @@ pub(crate) fn balance<W: Write>(
     ud_unit: bool,
 ) -> anyhow::Result<()> {
     let pubkey_or_script = PubkeyOrScript::from_str(pubkey_or_script)?;
+
+    let req_time = Instant::now();
     if let Some(AccountBalance {
         amount,
         ud_amount_opt,
     }) = requestor.account_balance(gva_endpoint, &pubkey_or_script, ud_unit)?
     {
+        println!(
+            "The server responded in {} ms.",
+            req_time.elapsed().as_millis()
+        );
+
         if let Some(ud_amount) = ud_amount_opt {
             writeln!(
                 out,

src/commands/current_ud.rs

@@ -20,7 +20,13 @@ pub(crate) fn current_ud<W: Write>(
     out: &mut W,
     requestor: &GvaRequestor,
 ) -> anyhow::Result<()> {
+    let req_time = Instant::now();
     if let Some(current_ud) = requestor.current_ud(gva_endpoint)? {
+        println!(
+            "The server responded in {} ms.",
+            req_time.elapsed().as_millis()
+        );
+
         let int_part = current_ud / 100;
         let dec_part = current_ud % 100;
         writeln!(

src/commands/idty.rs

@@ -22,12 +22,19 @@ pub(crate) fn idty<W: Write>(
     requestor: &GvaRequestor,
 ) -> anyhow::Result<()> {
     let pubkey = PublicKey::from_base58(pubkey)?;
+
+    let req_time = Instant::now();
     if let Some(Idty {
         is_member,
         username,
         ..
     }) = requestor.idty_by_pubkey(gva_endpoint, pubkey)?
     {
+        println!(
+            "The server responded in {} ms.",
+            req_time.elapsed().as_millis()
+        );
+
         writeln!(out, "Found identity for pubkey:")?;
         writeln!(out, "username: {}", username)?;
         writeln!(out, "is_member: {}", is_member)?;

src/commands/members_count.rs

@@ -20,7 +20,12 @@ pub(crate) fn members_count<W: Write>(
     out: &mut W,
     requestor: &GvaRequestor,
 ) -> anyhow::Result<()> {
+    let req_time = Instant::now();
     let members_count = requestor.members_count(gva_endpoint)?;
+    println!(
+        "The server responded in {} ms.",
+        req_time.elapsed().as_millis()
+    );
 
     writeln!(
         out,

src/main.rs

@@ -46,6 +46,7 @@ use std::{
     io::{BufReader, Read, Write},
     path::PathBuf,
     str::FromStr,
+    time::Instant,
 };
 use structopt::StructOpt;