From ba5ec9e09e1bbee3456d79a5de4561dad4772c6a Mon Sep 17 00:00:00 2001
From: antonl <anton.ljungdahl@gmail.com>
Date: Sun, 15 Mar 2026 13:10:47 +0100
Subject: [PATCH] results for go sparse

---
 goSparseResults.json               | 42 +++++++++++++++---------------
 src/main.go                        | 13 +++++++--
 suitesparse_test_matrices/urls.txt |  6 ++++-
 3 files changed, 37 insertions(+), 24 deletions(-)

diff --git a/goSparseResults.json b/goSparseResults.json
index 0d4d2b2..cf3c76b 100644
--- a/goSparseResults.json
+++ b/goSparseResults.json
@@ -5,12 +5,12 @@
   "cols": 147900,
   "nnz": 3489300,
   "matmul_runs": 16,
-  "matmul_total_ns": 1413419300,
-  "matmul_avg_ns": 88338706,
+  "matmul_total_ns": 1416892200,
+  "matmul_avg_ns": 88555762,
   "matmul_output_nnz": 14335500,
   "spmv_runs": 16,
-  "spmv_total_ns": 21010700,
-  "spmv_avg_ns": 1313168
+  "spmv_total_ns": 21017900,
+  "spmv_avg_ns": 1313618
  },
  {
   "label": "ldoor",
@@ -18,12 +18,12 @@
   "cols": 952203,
   "nnz": 23737339,
   "matmul_runs": 16,
-  "matmul_total_ns": 6835373200,
-  "matmul_avg_ns": 427210825,
+  "matmul_total_ns": 6867829500,
+  "matmul_avg_ns": 429239343,
   "matmul_output_nnz": 43783061,
   "spmv_runs": 16,
-  "spmv_total_ns": 156246400,
-  "spmv_avg_ns": 9765400
+  "spmv_total_ns": 156089700,
+  "spmv_avg_ns": 9755606
  },
  {
   "label": "Cube_Coup_dt0",
@@ -31,24 +31,24 @@
   "cols": 2164760,
   "nnz": 64685452,
   "matmul_runs": 16,
-  "matmul_total_ns": 32192429900,
-  "matmul_avg_ns": 2012026868,
+  "matmul_total_ns": 31149139200,
+  "matmul_avg_ns": 1946821200,
   "matmul_output_nnz": 234465452,
   "spmv_runs": 16,
-  "spmv_total_ns": 392950200,
-  "spmv_avg_ns": 24559387
+  "spmv_total_ns": 394415100,
+  "spmv_avg_ns": 24650943
  },
  {
-  "label": "nlpkkt240",
-  "rows": 27993600,
-  "cols": 27993600,
-  "nnz": 401232976,
+  "label": "nlpkkt200",
+  "rows": 16240000,
+  "cols": 16240000,
+  "nnz": 232232816,
   "matmul_runs": 16,
-  "matmul_total_ns": 38319352500,
-  "matmul_avg_ns": 2394959531,
-  "matmul_output_nnz": 401232976,
+  "matmul_total_ns": 19196846100,
+  "matmul_avg_ns": 1199802881,
+  "matmul_output_nnz": 232232816,
   "spmv_runs": 16,
-  "spmv_total_ns": 3164097400,
-  "spmv_avg_ns": 197756087
+  "spmv_total_ns": 1844563400,
+  "spmv_avg_ns": 115285212
  }
 ]
diff --git a/src/main.go b/src/main.go
index f398ff2..30a2385 100644
--- a/src/main.go
+++ b/src/main.go
@@ -6,6 +6,8 @@ import (
 	"fmt"
 	"os"
 	"path/filepath"
+	"runtime"
+	"runtime/debug"
 	"strconv"
 	"strings"
 	"time"
@@ -236,6 +238,8 @@ func doTimings(path string) SparseMatrixTiming {
 		fmt.Printf("Avg SpMV time for %s: %.4f ms\n", bcase.Timing.Label, avgSpMVTimeMS)
 	}
 
+	bcase.Matrix = nil // Signal GC that we release this now
+
 	return bcase.Timing
 }
 
@@ -246,13 +250,18 @@ func main() {
 		"suitesparse_test_matrices/FEM_3D_thermal2.mtx",
 		"suitesparse_test_matrices/ldoor.mtx",
 		"suitesparse_test_matrices/Cube_Coup_dt0.mtx",
-		"suitesparse_test_matrices/nlpkkt240.mtx",
+		"suitesparse_test_matrices/nlpkkt200.mtx",
 	}
 
 	results := make([]SparseMatrixTiming, 0, len(paths))
 
 	for _, path := range paths {
-		results = append(results, doTimings(path))
+		timing := doTimings(path)
+		results = append(results, timing)
+
+		// Make sure to free previous matrices to be effective with RAM
+		runtime.GC()
+		debug.FreeOSMemory()
 	}
 
 	writeTimingJSON(results, "goSparseResults.json")
diff --git a/suitesparse_test_matrices/urls.txt b/suitesparse_test_matrices/urls.txt
index 5171a86..39bec6b 100644
--- a/suitesparse_test_matrices/urls.txt
+++ b/suitesparse_test_matrices/urls.txt
@@ -10,6 +10,10 @@ https://suitesparse-collection-website.herokuapp.com/MM/GHS_psdef/ldoor.tar.gz
 # Almost 125M non-zero elements from a structural problem, 420mb compressed, 1.1GB uncompressed .mtx
 https://suitesparse-collection-website.herokuapp.com/MM/Janna/Cube_Coup_dt0.tar.gz
 
+
+# 440M NNZ, should fit in my 32GB ram.  667 mb compressed, 4.7gb uncompressed
+
+
 # 760M NNZ, optimization problem 1.23GB compressed, 8.4 GB uncompressed
-# This was too large for my 32 GB memory and I went into swap... probably should exclude
+# This was too large for my 32 GB memory and I went into swap... probably should exclude because not fair timings... probably will spend majority of time in swap.
 https://suitesparse-collection-website.herokuapp.com/MM/Schenk/nlpkkt240.tar.gz
\ No newline at end of file