warn on very large structural types that slow us down

1 files changed, 1 insertions, 0 deletions

diff --git a/src/analyzer.js b/src/analyzer.js
index c09739e9..5f62bfd1 100644
--- a/src/analyzer.js
+++ b/src/analyzer.js
@@ -690,6 +690,7 @@ function analyzer(data, sidePass) {
       var subType = check[2];
       addTypeInternal(subType, data); // needed for anonymous structure definitions (see below)
 
+      if (num >= 10*1024*1024) warnOnce('warning: very large fixed-size structural type: ' + type + ' - can you reduce it? (compilation may be slow)');
       Types.types[nonPointing] = {
         name_: nonPointing,
         fields: range(num).map(function() { return subType }),