diff --git a/pages/similar_by_color/[id].tsx b/pages/similar_by_color/[id].tsx
index 96beec4..a741242 100644
--- a/pages/similar_by_color/[id].tsx
+++ b/pages/similar_by_color/[id].tsx
@@ -51,7 +51,7 @@ export async function getStaticProps(context: any) {
   const photos = []
   if (context.params.id) {
     const id=parseInt(context.params.id)
-    let similar_by_color:Array<Record<string,any>>=(await db_ops.image_search.get_color_similarities_by_id(id)).filter((el:any)=>el.similarity>0.2)
+    let similar_by_color:Array<Record<string,any>>=((await db_ops.image_search.get_color_similarities_by_id(id))[0].similarities).filter((el:any)=>el.similarity>0.2)
     similar_by_color.sort((a,b)=>b.similarity-a.similarity)
     similar_by_color=similar_by_color.slice(0,images_on_page)
     for(const img of similar_by_color){
diff --git a/server/bulk_calculate_color_hist_and_similarities/calculate_color_hists_and_similarities.ts b/server/bulk_calculate_color_hist_and_similarities/calculate_color_hists_and_similarities.ts
index d055ccb..143dc9e 100644
--- a/server/bulk_calculate_color_hist_and_similarities/calculate_color_hists_and_similarities.ts
+++ b/server/bulk_calculate_color_hist_and_similarities/calculate_color_hists_and_similarities.ts
@@ -2,6 +2,7 @@ import * as cv from 'opencv4nodejs'
 import { HistAxes } from 'opencv4nodejs';
 import path from 'path';
 import db_ops from '../helpers/db_ops'
+import config from '../../config/config'
 const BIN_SIZE=16
 const histAxes:HistAxes[]= [
     new HistAxes({
@@ -20,9 +21,10 @@ const histAxes:HistAxes[]= [
         ranges: [0, 255]
       }),
   ]
-const PATH_TO_IMAGES = path.join("..", "..", "..", 'public', 'images')
+const PATH_TO_IMAGES = path.join(config.root_path, 'public', 'images')
 
 async function calculate_color_hist(){
+  return
     const images = await db_ops.image_ops.get_all_images()
     for(const image of images){
         const check_if_already_calculated= await db_ops.image_search.get_color_hist_by_id(image.id)
@@ -41,21 +43,35 @@ async function calculate_color_hist(){
 }
 
 async function calc_similarities() {
+  const cache=[]
   const images = await db_ops.image_ops.get_all_images() 
+  for(let i=0;i<images.length;i++){
+    cache[i]=Array(images.length).fill(-1)
+ } 
   const get_all_hist=await db_ops.image_search.get_all_color_hists()
   console.time();
   for (let i = 0; i < images.length - 1; i++) {
-    const check_if_already_calculated=await db_ops.image_search.get_color_similarities_by_id(images[i].id)
-    if(check_if_already_calculated.length!==0){
-      continue
-    }
+    // const check_if_already_calculated=await db_ops.image_search.get_color_similarities_by_id(images[i].id)
+    // if(check_if_already_calculated.length!==0){
+    //   continue
+    // }
+    
     const target_image = get_all_hist.find((el)=>el.id===images[i].id)
     const target_hist = new cv.Mat(target_image.color_hist, cv.CV_32F)
     const similarities=[]
-    for (let j = i + 1; j < images.length; j++) {
+    for (let j = 0; j < images.length; j++) {
+      if(i===j){
+        continue;
+      }
+      if(cache[j][i]!==-1){
+        console.log('cache hit')
+        similarities.push({id:images[j].id,similarity:cache[j][i]})
+        continue
+      }
       const _image = get_all_hist.find((el)=>el.id===images[j].id)
       const color_hist_mat = new cv.Mat(_image.color_hist, cv.CV_32F);
       const similarity = await target_hist.compareHistAsync(color_hist_mat, cv.HISTCMP_INTERSECT)
+      cache[i][j]=similarity
       similarities.push({id:images[j].id,similarity:similarity})
       color_hist_mat.release()
       console.log(`${i}->${j}`)
@@ -67,6 +83,6 @@ async function calc_similarities() {
 async function calc_color_hists_and_similarities() {
   await calculate_color_hist()
   await calc_similarities()
-  process.exit()
+  // process.exit()
 }
 calc_color_hists_and_similarities()
\ No newline at end of file
diff --git a/server/helpers/db_ops.ts b/server/helpers/db_ops.ts
index bf26c56..d5022b2 100644
--- a/server/helpers/db_ops.ts
+++ b/server/helpers/db_ops.ts
@@ -94,12 +94,7 @@ async function generate_id() {
 async function get_color_similarities_by_id(id:number){
 const collection = client.db(db_main).collection("color_similarities");
 // collection.find(selector).project({_id:0}).explain((_err,exp)=>console.log(exp))
-const similarities_by_id = await collection.find({id:id}).project({_id:0,id:0}).toArray()
-const similarities=(similarities_by_id[0]?.similarities||[])
-const other_images_similar_by_id = await collection.find({similarities: { $elemMatch: { id: id} }}).project({_id:0,id:1,"similarities.$": 1,}).toArray()
-for(const x of other_images_similar_by_id){
-    similarities.push({id:x.id,similarity:x.similarities[0].similarity})
-}
+const similarities = collection.find({id:id}).project({_id:0,id:0}).toArray()
 return similarities
 }
 
diff --git a/server/helpers/image_ops.ts b/server/helpers/image_ops.ts
index c9c4168..2d1c760 100644
--- a/server/helpers/image_ops.ts
+++ b/server/helpers/image_ops.ts
@@ -27,14 +27,16 @@ const histAxes:HistAxes[]= [
         rgb_hist = rgb_hist.div(img_mat.sizes[0]*img_mat.sizes[1])
         const arr=rgb_hist.getDataAsArray()    
         db_ops.image_search.add_color_hist_by_id(new_image_id,arr)
+        const similarities=[]
         const ids=(await db_ops.image_search.get_image_ids_from_color_similarities()).map((el)=>el.id)
         for(const _id of ids){
             const _image = (await db_ops.image_search.get_color_hist_by_id(_id))[0]
             const color_hist_mat = new cv.Mat(_image.color_hist, cv.CV_32F);
             const similarity = await rgb_hist.compareHistAsync(color_hist_mat, cv.HISTCMP_INTERSECT)
             color_hist_mat.release()
+            similarities.push({id:_id,similarity:similarity})
             db_ops.image_search.add_color_similarity_to_other_image(_id,{id:new_image_id,similarity:similarity})
         }
-        await db_ops.image_search.add_color_similarities_by_id(new_image_id,[])
+        await db_ops.image_search.add_color_similarities_by_id(new_image_id,similarities)
 }
 export default {calculate_color_hist_and_similarities}
\ No newline at end of file
diff --git a/server/routes/import_from_derpi.ts b/server/routes/import_from_derpi.ts
index a64bb19..ad4ba85 100644
--- a/server/routes/import_from_derpi.ts
+++ b/server/routes/import_from_derpi.ts
@@ -57,6 +57,7 @@ async function import_from_derpi(req: Request, res: Response) {
                 await db_ops.image_ops.add_image(new_image_id, derpi_data.format.toLowerCase(), derpi_data.width, derpi_data.height, parsed_author, derpi_data.size,
                     derpi_link, derpi_data.upvotes, derpi_data.downvotes, derpi_data.id, derpi_data.created_at,
                     derpi_data.source_url, derpi_data.tags, derpi_data.wilson_score, derpi_data.sha512_hash, phash, derpi_data.description)
+                console.log(`OK. New image_id: ${new_image_id}`)
                 res.json({ message: `OK. New image_id: ${new_image_id}`})
                 return
             } catch (error) {