From 5605fbd3086f138c90cfa97a95eea764ee50677b Mon Sep 17 00:00:00 2001
From: Alexandru Vasile <60601340+lexnv@users.noreply.github.com>
Date: Wed, 27 Apr 2022 13:58:33 +0300
Subject: [PATCH] test-runtime: Add exponential backoff (#518)

Signed-off-by: Alexandru Vasile <alexandru.vasile@parity.io>
---
 test-runtime/build.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test-runtime/build.rs b/test-runtime/build.rs
index c052cf4c69..746550b425 100644
--- a/test-runtime/build.rs
+++ b/test-runtime/build.rs
@@ -64,7 +64,7 @@ async fn run() {
 
     // Download metadata from binary; retry until successful, or a limit is hit.
     let metadata_bytes: sp_core::Bytes = {
-        const MAX_RETRIES: usize = 20;
+        const MAX_RETRIES: usize = 6;
         let mut retries = 0;
 
         loop {
@@ -85,7 +85,7 @@ async fn run() {
                     break res
                 }
                 _ => {
-                    thread::sleep(time::Duration::from_secs(1));
+                    thread::sleep(time::Duration::from_secs(1 << retries));
                     retries += 1;
                 }
             };