diff --git a/src/core/evaluator.js b/src/core/evaluator.js
index b380c8960..77aebfb5f 100644
--- a/src/core/evaluator.js
+++ b/src/core/evaluator.js
@@ -71,7 +71,6 @@ import { DecodeStream } from "./decode_stream.js";
 import { FontFlags } from "./fonts_utils.js";
 import { getFontSubstitution } from "./font_substitutions.js";
 import { getGlyphsUnicode } from "./glyphlist.js";
-import { getLookupTableFactory } from "./core_utils.js";
 import { getMetrics } from "./metrics.js";
 import { getUnicodeForGlyph } from "./unicode.js";
 import { ImageResizer } from "./image_resizer.js";
@@ -4734,126 +4733,124 @@ class EvaluatorPreprocessor {
     //
     // If variableArgs === true: [0, `numArgs`] expected
     // If variableArgs === false: exactly `numArgs` expected
-    const getOPMap = getLookupTableFactory(function (t) {
+    return shadow(this, "opMap", {
       // Graphic state
-      t.w = { id: OPS.setLineWidth, numArgs: 1, variableArgs: false };
-      t.J = { id: OPS.setLineCap, numArgs: 1, variableArgs: false };
-      t.j = { id: OPS.setLineJoin, numArgs: 1, variableArgs: false };
-      t.M = { id: OPS.setMiterLimit, numArgs: 1, variableArgs: false };
-      t.d = { id: OPS.setDash, numArgs: 2, variableArgs: false };
-      t.ri = { id: OPS.setRenderingIntent, numArgs: 1, variableArgs: false };
-      t.i = { id: OPS.setFlatness, numArgs: 1, variableArgs: false };
-      t.gs = { id: OPS.setGState, numArgs: 1, variableArgs: false };
-      t.q = { id: OPS.save, numArgs: 0, variableArgs: false };
-      t.Q = { id: OPS.restore, numArgs: 0, variableArgs: false };
-      t.cm = { id: OPS.transform, numArgs: 6, variableArgs: false };
+      w: { id: OPS.setLineWidth, numArgs: 1, variableArgs: false },
+      J: { id: OPS.setLineCap, numArgs: 1, variableArgs: false },
+      j: { id: OPS.setLineJoin, numArgs: 1, variableArgs: false },
+      M: { id: OPS.setMiterLimit, numArgs: 1, variableArgs: false },
+      d: { id: OPS.setDash, numArgs: 2, variableArgs: false },
+      ri: { id: OPS.setRenderingIntent, numArgs: 1, variableArgs: false },
+      i: { id: OPS.setFlatness, numArgs: 1, variableArgs: false },
+      gs: { id: OPS.setGState, numArgs: 1, variableArgs: false },
+      q: { id: OPS.save, numArgs: 0, variableArgs: false },
+      Q: { id: OPS.restore, numArgs: 0, variableArgs: false },
+      cm: { id: OPS.transform, numArgs: 6, variableArgs: false },
 
       // Path
-      t.m = { id: OPS.moveTo, numArgs: 2, variableArgs: false };
-      t.l = { id: OPS.lineTo, numArgs: 2, variableArgs: false };
-      t.c = { id: OPS.curveTo, numArgs: 6, variableArgs: false };
-      t.v = { id: OPS.curveTo2, numArgs: 4, variableArgs: false };
-      t.y = { id: OPS.curveTo3, numArgs: 4, variableArgs: false };
-      t.h = { id: OPS.closePath, numArgs: 0, variableArgs: false };
-      t.re = { id: OPS.rectangle, numArgs: 4, variableArgs: false };
-      t.S = { id: OPS.stroke, numArgs: 0, variableArgs: false };
-      t.s = { id: OPS.closeStroke, numArgs: 0, variableArgs: false };
-      t.f = { id: OPS.fill, numArgs: 0, variableArgs: false };
-      t.F = { id: OPS.fill, numArgs: 0, variableArgs: false };
-      t["f*"] = { id: OPS.eoFill, numArgs: 0, variableArgs: false };
-      t.B = { id: OPS.fillStroke, numArgs: 0, variableArgs: false };
-      t["B*"] = { id: OPS.eoFillStroke, numArgs: 0, variableArgs: false };
-      t.b = { id: OPS.closeFillStroke, numArgs: 0, variableArgs: false };
-      t["b*"] = { id: OPS.closeEOFillStroke, numArgs: 0, variableArgs: false };
-      t.n = { id: OPS.endPath, numArgs: 0, variableArgs: false };
+      m: { id: OPS.moveTo, numArgs: 2, variableArgs: false },
+      l: { id: OPS.lineTo, numArgs: 2, variableArgs: false },
+      c: { id: OPS.curveTo, numArgs: 6, variableArgs: false },
+      v: { id: OPS.curveTo2, numArgs: 4, variableArgs: false },
+      y: { id: OPS.curveTo3, numArgs: 4, variableArgs: false },
+      h: { id: OPS.closePath, numArgs: 0, variableArgs: false },
+      re: { id: OPS.rectangle, numArgs: 4, variableArgs: false },
+      S: { id: OPS.stroke, numArgs: 0, variableArgs: false },
+      s: { id: OPS.closeStroke, numArgs: 0, variableArgs: false },
+      f: { id: OPS.fill, numArgs: 0, variableArgs: false },
+      F: { id: OPS.fill, numArgs: 0, variableArgs: false },
+      "f*": { id: OPS.eoFill, numArgs: 0, variableArgs: false },
+      B: { id: OPS.fillStroke, numArgs: 0, variableArgs: false },
+      "B*": { id: OPS.eoFillStroke, numArgs: 0, variableArgs: false },
+      b: { id: OPS.closeFillStroke, numArgs: 0, variableArgs: false },
+      "b*": { id: OPS.closeEOFillStroke, numArgs: 0, variableArgs: false },
+      n: { id: OPS.endPath, numArgs: 0, variableArgs: false },
 
       // Clipping
-      t.W = { id: OPS.clip, numArgs: 0, variableArgs: false };
-      t["W*"] = { id: OPS.eoClip, numArgs: 0, variableArgs: false };
+      W: { id: OPS.clip, numArgs: 0, variableArgs: false },
+      "W*": { id: OPS.eoClip, numArgs: 0, variableArgs: false },
 
       // Text
-      t.BT = { id: OPS.beginText, numArgs: 0, variableArgs: false };
-      t.ET = { id: OPS.endText, numArgs: 0, variableArgs: false };
-      t.Tc = { id: OPS.setCharSpacing, numArgs: 1, variableArgs: false };
-      t.Tw = { id: OPS.setWordSpacing, numArgs: 1, variableArgs: false };
-      t.Tz = { id: OPS.setHScale, numArgs: 1, variableArgs: false };
-      t.TL = { id: OPS.setLeading, numArgs: 1, variableArgs: false };
-      t.Tf = { id: OPS.setFont, numArgs: 2, variableArgs: false };
-      t.Tr = { id: OPS.setTextRenderingMode, numArgs: 1, variableArgs: false };
-      t.Ts = { id: OPS.setTextRise, numArgs: 1, variableArgs: false };
-      t.Td = { id: OPS.moveText, numArgs: 2, variableArgs: false };
-      t.TD = { id: OPS.setLeadingMoveText, numArgs: 2, variableArgs: false };
-      t.Tm = { id: OPS.setTextMatrix, numArgs: 6, variableArgs: false };
-      t["T*"] = { id: OPS.nextLine, numArgs: 0, variableArgs: false };
-      t.Tj = { id: OPS.showText, numArgs: 1, variableArgs: false };
-      t.TJ = { id: OPS.showSpacedText, numArgs: 1, variableArgs: false };
-      t["'"] = { id: OPS.nextLineShowText, numArgs: 1, variableArgs: false };
-      t['"'] = {
+      BT: { id: OPS.beginText, numArgs: 0, variableArgs: false },
+      ET: { id: OPS.endText, numArgs: 0, variableArgs: false },
+      Tc: { id: OPS.setCharSpacing, numArgs: 1, variableArgs: false },
+      Tw: { id: OPS.setWordSpacing, numArgs: 1, variableArgs: false },
+      Tz: { id: OPS.setHScale, numArgs: 1, variableArgs: false },
+      TL: { id: OPS.setLeading, numArgs: 1, variableArgs: false },
+      Tf: { id: OPS.setFont, numArgs: 2, variableArgs: false },
+      Tr: { id: OPS.setTextRenderingMode, numArgs: 1, variableArgs: false },
+      Ts: { id: OPS.setTextRise, numArgs: 1, variableArgs: false },
+      Td: { id: OPS.moveText, numArgs: 2, variableArgs: false },
+      TD: { id: OPS.setLeadingMoveText, numArgs: 2, variableArgs: false },
+      Tm: { id: OPS.setTextMatrix, numArgs: 6, variableArgs: false },
+      "T*": { id: OPS.nextLine, numArgs: 0, variableArgs: false },
+      Tj: { id: OPS.showText, numArgs: 1, variableArgs: false },
+      TJ: { id: OPS.showSpacedText, numArgs: 1, variableArgs: false },
+      "'": { id: OPS.nextLineShowText, numArgs: 1, variableArgs: false },
+      '"': {
         id: OPS.nextLineSetSpacingShowText,
         numArgs: 3,
         variableArgs: false,
-      };
+      },
 
       // Type3 fonts
-      t.d0 = { id: OPS.setCharWidth, numArgs: 2, variableArgs: false };
-      t.d1 = {
+      d0: { id: OPS.setCharWidth, numArgs: 2, variableArgs: false },
+      d1: {
         id: OPS.setCharWidthAndBounds,
         numArgs: 6,
         variableArgs: false,
-      };
+      },
 
       // Color
-      t.CS = { id: OPS.setStrokeColorSpace, numArgs: 1, variableArgs: false };
-      t.cs = { id: OPS.setFillColorSpace, numArgs: 1, variableArgs: false };
-      t.SC = { id: OPS.setStrokeColor, numArgs: 4, variableArgs: true };
-      t.SCN = { id: OPS.setStrokeColorN, numArgs: 33, variableArgs: true };
-      t.sc = { id: OPS.setFillColor, numArgs: 4, variableArgs: true };
-      t.scn = { id: OPS.setFillColorN, numArgs: 33, variableArgs: true };
-      t.G = { id: OPS.setStrokeGray, numArgs: 1, variableArgs: false };
-      t.g = { id: OPS.setFillGray, numArgs: 1, variableArgs: false };
-      t.RG = { id: OPS.setStrokeRGBColor, numArgs: 3, variableArgs: false };
-      t.rg = { id: OPS.setFillRGBColor, numArgs: 3, variableArgs: false };
-      t.K = { id: OPS.setStrokeCMYKColor, numArgs: 4, variableArgs: false };
-      t.k = { id: OPS.setFillCMYKColor, numArgs: 4, variableArgs: false };
+      CS: { id: OPS.setStrokeColorSpace, numArgs: 1, variableArgs: false },
+      cs: { id: OPS.setFillColorSpace, numArgs: 1, variableArgs: false },
+      SC: { id: OPS.setStrokeColor, numArgs: 4, variableArgs: true },
+      SCN: { id: OPS.setStrokeColorN, numArgs: 33, variableArgs: true },
+      sc: { id: OPS.setFillColor, numArgs: 4, variableArgs: true },
+      scn: { id: OPS.setFillColorN, numArgs: 33, variableArgs: true },
+      G: { id: OPS.setStrokeGray, numArgs: 1, variableArgs: false },
+      g: { id: OPS.setFillGray, numArgs: 1, variableArgs: false },
+      RG: { id: OPS.setStrokeRGBColor, numArgs: 3, variableArgs: false },
+      rg: { id: OPS.setFillRGBColor, numArgs: 3, variableArgs: false },
+      K: { id: OPS.setStrokeCMYKColor, numArgs: 4, variableArgs: false },
+      k: { id: OPS.setFillCMYKColor, numArgs: 4, variableArgs: false },
 
       // Shading
-      t.sh = { id: OPS.shadingFill, numArgs: 1, variableArgs: false };
+      sh: { id: OPS.shadingFill, numArgs: 1, variableArgs: false },
 
       // Images
-      t.BI = { id: OPS.beginInlineImage, numArgs: 0, variableArgs: false };
-      t.ID = { id: OPS.beginImageData, numArgs: 0, variableArgs: false };
-      t.EI = { id: OPS.endInlineImage, numArgs: 1, variableArgs: false };
+      BI: { id: OPS.beginInlineImage, numArgs: 0, variableArgs: false },
+      ID: { id: OPS.beginImageData, numArgs: 0, variableArgs: false },
+      EI: { id: OPS.endInlineImage, numArgs: 1, variableArgs: false },
 
       // XObjects
-      t.Do = { id: OPS.paintXObject, numArgs: 1, variableArgs: false };
-      t.MP = { id: OPS.markPoint, numArgs: 1, variableArgs: false };
-      t.DP = { id: OPS.markPointProps, numArgs: 2, variableArgs: false };
-      t.BMC = { id: OPS.beginMarkedContent, numArgs: 1, variableArgs: false };
-      t.BDC = {
+      Do: { id: OPS.paintXObject, numArgs: 1, variableArgs: false },
+      MP: { id: OPS.markPoint, numArgs: 1, variableArgs: false },
+      DP: { id: OPS.markPointProps, numArgs: 2, variableArgs: false },
+      BMC: { id: OPS.beginMarkedContent, numArgs: 1, variableArgs: false },
+      BDC: {
         id: OPS.beginMarkedContentProps,
         numArgs: 2,
         variableArgs: false,
-      };
-      t.EMC = { id: OPS.endMarkedContent, numArgs: 0, variableArgs: false };
+      },
+      EMC: { id: OPS.endMarkedContent, numArgs: 0, variableArgs: false },
 
       // Compatibility
-      t.BX = { id: OPS.beginCompat, numArgs: 0, variableArgs: false };
-      t.EX = { id: OPS.endCompat, numArgs: 0, variableArgs: false };
+      BX: { id: OPS.beginCompat, numArgs: 0, variableArgs: false },
+      EX: { id: OPS.endCompat, numArgs: 0, variableArgs: false },
 
       // (reserved partial commands for the lexer)
-      t.BM = null;
-      t.BD = null;
-      t.true = null;
-      t.fa = null;
-      t.fal = null;
-      t.fals = null;
-      t.false = null;
-      t.nu = null;
-      t.nul = null;
-      t.null = null;
+      BM: null,
+      BD: null,
+      true: null,
+      fa: null,
+      fal: null,
+      fals: null,
+      false: null,
+      nu: null,
+      nul: null,
+      null: null,
     });
-
-    return shadow(this, "opMap", getOPMap());
   }
 
   static MAX_INVALID_PATH_OPS = 10;