[reclient] Update flags in reproxy.cfg.template to improve apac performance

Change-Id: I92507f08436769d38b53ea1fea370bf59a6b6320
Bug: b/278498980
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4443307
Reviewed-by: Michael Savigny <msavigny@google.com>
Commit-Queue: Michael Savigny <msavigny@google.com>
Cr-Commit-Position: refs/heads/main@{#1132068}
NOKEYCHECK=True
GitOrigin-RevId: 205f8f7b13429918d913f036f07e25a8bc437192
diff --git a/reclient_cfgs/reproxy_cfg_templates/reproxy.cfg.template b/reclient_cfgs/reproxy_cfg_templates/reproxy.cfg.template
index b2a1591..cb3bac3 100644
--- a/reclient_cfgs/reproxy_cfg_templates/reproxy.cfg.template
+++ b/reclient_cfgs/reproxy_cfg_templates/reproxy.cfg.template
@@ -7,6 +7,17 @@
 deps_cache_max_mb=256
 # TODO(b/276727504) Re-enable once noop build shutdown time bug is fixed
 # enable_deps_cache=true
-use_unified_uploads=true
+# TODO(b/263125591) Re-enable once slowness on fully remote builds is resolved
+# use_unified_uploads=true
 fast_log_collection=true
 depsscanner_address=exec://${scandeps_bin_path}
+
+# Improve upload/download concurrency
+max_concurrent_streams_per_conn=50
+max_concurrent_requests_per_conn=50
+min_grpc_connections=50
+cas_concurrency=1000
+
+# Always compress artifacts
+compression_threshold=0
+use_batches=false