From a1bcef62b8789577542120470d8fb9ded4633d8f Mon Sep 17 00:00:00 2001
From: "Steven G. Johnson" <stevenj@alum.mit.edu>
Date: Sat, 28 Feb 2026 07:51:58 -0500
Subject: [PATCH 1/2] use L1 norm for drop tolerance

---
 src/interp.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/interp.jl b/src/interp.jl
index d8c405d..bfce593 100644
--- a/src/interp.jl
+++ b/src/interp.jl
@@ -72,7 +72,7 @@ infnorm(x::Number) = abs(x)
 infnorm(x::AbstractArray) = maximum(abs, x)
 
 function droptol(coefs::Array{<:Any,N}, tol::Real) where {N}
-    abstol = maximum(infnorm, coefs) * tol # absolute tolerance
+    abstol = sum(infnorm, coefs) * tol # absolute tolerance = L1 norm * tol
     all(c -> infnorm(c) ≥ abstol, coefs) && return coefs # nothing to drop
 
     # compute the new size along each dimension by checking

From 00b2803cecde2865186807f8819a6257c3047c08 Mon Sep 17 00:00:00 2001
From: "Steven G. Johnson" <stevenj@alum.mit.edu>
Date: Sat, 28 Feb 2026 07:57:16 -0500
Subject: [PATCH 2/2] update CI

---
 .github/workflows/CI.yml | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index 256ed57..1c88168 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -23,24 +23,15 @@ jobs:
         arch:
           - x64
     steps:
-      - uses: actions/checkout@v2
-      - uses: julia-actions/setup-julia@v1
+      - uses: actions/checkout@v5
+      - uses: julia-actions/setup-julia@v2
         with:
           version: ${{ matrix.version }}
           arch: ${{ matrix.arch }}
-      - uses: actions/cache@v1
-        env:
-          cache-name: cache-artifacts
-        with:
-          path: ~/.julia/artifacts
-          key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('**/Project.toml') }}
-          restore-keys: |
-            ${{ runner.os }}-test-${{ env.cache-name }}-
-            ${{ runner.os }}-test-
-            ${{ runner.os }}-
+      - uses: julia-actions/cache@v2
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
-      - uses: codecov/codecov-action@v1
+      - uses: codecov/codecov-action@v5
         with:
           file: lcov.info